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Plural of Thesis

What is the plural of thesis.

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The standard rules for forming the plurals, why is there confusion over the plural of thesis.

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plural of thesis

Type Example of Type Forming the Plural Plural
Most Nouns add s
Noun Ending s, sh, ch, x or z add es
Nouns ending [consonant] o add either s or es
(There are no rules for this - you have to know.)
Nouns ending [vowel] o add s
Nouns ending [consonant] y change the y to an i and add es
Nouns ending [vowel] y add s
Nouns ending f or fe ves and/or s
(There are no rules - you have to know.)
Nouns ending is
change the "is" to "es"
Exceptions some nouns undergo a vowel or letters change
More exceptions some nouns do not change at all
Foreign rulings some nouns adopt foreign rulings

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Definition of thesis

Did you know.

In high school, college, or graduate school, students often have to write a thesis on a topic in their major field of study. In many fields, a final thesis is the biggest challenge involved in getting a master's degree, and the same is true for students studying for a Ph.D. (a Ph.D. thesis is often called a dissertation ). But a thesis may also be an idea; so in the course of the paper the student may put forth several theses (notice the plural form) and attempt to prove them.

Examples of thesis in a Sentence

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'thesis.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

in sense 3, Middle English, lowering of the voice, from Late Latin & Greek; Late Latin, from Greek, downbeat, more important part of a foot, literally, act of laying down; in other senses, Latin, from Greek, literally, act of laying down, from tithenai to put, lay down — more at do

14th century, in the meaning defined at sense 3a(1)

Dictionary Entries Near thesis

the sins of the fathers are visited upon the children

thesis novel

Cite this Entry

“Thesis.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/thesis. Accessed 10 Jul. 2024.

Kids Definition

Kids definition of thesis, more from merriam-webster on thesis.

Nglish: Translation of thesis for Spanish Speakers

Britannica English: Translation of thesis for Arabic Speakers

Britannica.com: Encyclopedia article about thesis

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What’s the Plural of Thesis? (Thesises? Theses?)

  • November 13, 2022

thesis is plural

What’s the plural of “thesis”?

Thesis , (and its plural theses ) is an example of one of the many common English words that has roots elsewhere. In this case, thesis is a word that has roots all the way back to Ancient Greek. Like other similarly structured words: diagnosis , synthesis , analysis , oasis , crisis , nemesis and the like, thesis is by no means the only frequently used Greek word that’s made it to Modern English.

What’s the singular of thesis?

"Thesis" singular in sentences.

Thesis is a singular noun and refers to one thing (or one thesis ).

What’s a thesis?

Merriam-Webster defines the noun thesis (plural theses ) as follows, “a dissertation embodying results of original research and especially substantiating a specific view especially : one written by a candidate for an academic degree.”

thesis is plural

Nouns that end in -sis/ses

Thesis is an irregular plural noun that does not end in the typical -s / -es that regular plural noun forms take. This is so despite that theses plural does in fact end in the conventional -s/-es suffix. Why is it still considered irregular; then, given that it follows the regular plural form? Notice the following regular plural noun forms:

thesis is plural

Thesis / theses operates differently. With these Greek words, the -ses does not simply  add onto the end of the singular form of the noun; instead, -ses replaces the singular noun’s suffixes, and effectively changes the entire spelling of the word (and arguably the word itself.)

crises

Examples of “thesis” (singular) in sentences

His master thesis was on modal neural networks.
She wrote her thesis on Renaissance Nativity scenes.
We disagreed with the basic thesis of the report.
I’ve made a first draft of my thesis .
The student’s experiments helped her formulate a thesis to share with her professor and classmates.

Examples of “theses” (plural) in sentences

It must not be assumed that Luther’s ninety-five theses produced any considerable direct results.
The collection of theses are ready for publication.
Twenty years after Savonarola’s death Martin Luther made public his theses against indulgences.
Theses are generally examined by two or more specialists.
Theses is the plural form of the singular noun thesis.

Origin of the word “thesis”

Thesis / theses are of Greek origin.

Read about other irregular nouns

  • What’s the plural of bison?
  • What’s the plural of moose?
  • What’s the plural of sheep?
  • What’s the plural of ox?
  • What’s the plural of cactus?
  • What’s the plural of crisis?
  • What’s the plural of hypothesis?

Read about other topics in grammar

  • What’re personal pronouns?
  • What’s the difference between they’re, their, and there?
  • Whose vs who’s?
  • Merriam-Webster, thesis/theses.

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[ thee -sis ]

He vigorously defended his thesis on the causes of war.

Synonyms: proposal , contention , theory

  • a subject for a composition or essay.
  • a dissertation on a particular subject in which one has done original research, as one presented by a candidate for a diploma or degree.
  • Music. the downward stroke in conducting; downbeat. Compare arsis ( def 1 ) .
  • a part of a metrical foot that does not bear the ictus or stress.
  • (less commonly) the part of a metrical foot that bears the ictus. Compare arsis ( def 2 ) .
  • Philosophy. Hegelian dialectic

/ ˈθiːsɪs /

  • a dissertation resulting from original research, esp when submitted by a candidate for a degree or diploma
  • a doctrine maintained or promoted in argument
  • a subject for a discussion or essay
  • an unproved statement, esp one put forward as a premise in an argument
  • music the downbeat of a bar, as indicated in conducting
  • (in classical prosody) the syllable or part of a metrical foot not receiving the ictus Compare arsis
  • philosophy the first stage in the Hegelian dialectic, that is challenged by the antithesis
  • The central idea in a piece of writing, sometimes contained in a topic sentence .

Word History and Origins

Origin of thesis 1

Example Sentences

“The Saudis have been proving the thesis of the film — they do in fact have an army,” said Thor Halvorssen, founder and chief executive of the nonprofit Human Rights Foundation, which funded the movie.

It’s a hypothesis that Bush pursued in her master’s thesis, and last year she began attending virtual Goth parties in a final round of field work before defending her doctoral thesis later this year.

While this partnership was planned prior to the coronavirus outbreak, co-founder Jordana Kier said the pandemic instantly proved out the expansion thesis.

They’ve had to defend that thesis for a very, very long time in front of a variety of different customers and different people.

Over the past decade, In-Q-Tel has been one of the most active investors in the commercial space sector, with a broad investment thesis that touches many aspects of the sector.

In “Back Home,” Gil also revisits the nostalgia for the South explored in his Johns Hopkins thesis, “Circle of Stone.”

At least father and son were in alignment on this central thesis: acting “gay”—bad; being thought of as gay—bad.

Her doctoral thesis, says Ramin Takloo at the University of Illinois, was simply outstanding.

Marshall McLuhan long ago argued the now accepted thesis that different mediums have different influences on thinking.

He wrote his Master's thesis on the underrepresentation of young people in Congress.

And indeed for most young men a college thesis is but an exercise for sharpening the wits, rarely dangerous in its later effects.

It will be for the reader to determine whether the main thesis of the book has gained or lost by the new evidence.

But the word thesis, when applied to Systems, does not mean the 'position' of single notes, but of groups of notes.

This conclusion, it need hardly be said, is in entire agreement with the main thesis of the preceding pages.

Sundry outlying Indians, with ammunition to waste, took belly and knee rests and strengthened the thesis to the contrary.

Related Words

  • proposition
  • supposition

What Is The Plural Of Thesis?

Plural word for  thesis.

The plural form of thesis is theses , pronounced [ thee -seez ]. The plurals of several other singular words that end in -is are also formed in this way, including hypothesis / hypotheses , crisis / crises , and axis / axes . A similar change is made when pluralizing appendix as appendices . 

Irregular plurals that are formed like theses derive directly from their original pluralization in Latin and Greek.

ESLBUZZ

Plural of Thesis: A Quick Guide for English Learners

By: Author ESLBUZZ

Posted on Last updated: October 11, 2023

Sharing is caring!

Do you know the plural of thesis? Understanding the correct plural of thesis is important not only for academic writing, but for general communication as well. Whether you’re discussing multiple research papers or simply trying to sound knowledgeable in a conversation, using the correct plural form can help you make a good impression and avoid any confusion or misunderstandings.

Plural of Thesis

Plural of Thesis: A Quick Guide for English Learners

Definition and Plural of Thesis

When writing a research paper or dissertation, the central argument or main point is known as a thesis. A thesis is a statement or proposition that is put forward as a premise to be maintained or proved. It is a crucial element of academic writing and is often required for a degree or certification.

The plural of thesis is “theses.” In English, most nouns form the plural by adding an “s” at the end. However, “thesis” is one of the few exceptions to this rule. The word “thesis” has a Greek root, and “theses” is how it is pluralized in that original language.

Singular Plural
Thesis Theses

It is important to note that “theses” is the only way to make the noun “thesis” plural. There is no alternative form of the plural for this word.

In academic writing, the plural form “theses” is commonly used when referring to multiple research papers or dissertations. For example, “I have read several theses on this topic, and they all have different viewpoints.”

When to Use Thesis and Its Plural Form

When writing academic papers or conducting research, it is important to understand when to use the word “thesis” and its plural form, “theses.” Here are some guidelines to help you use these words correctly:

  • Use “thesis” when referring to a single research paper or dissertation that presents a specific argument or viewpoint.
  • Use “theses” when referring to multiple research papers or dissertations.
  • Remember that “thesis” is a singular noun and “theses” is its plural form.
  • Be aware that “thesis” has a Greek root and follows the same pluralization rule as other Greek words ending in “-is,” such as “crisis” and “analysis.” They become “crises” and “analyses,” respectively.
  • Keep in mind that “thesis” can also refer to a statement or proposition that is put forward for consideration or discussion. In this case, the plural form would be “theses.”
  • When citing multiple theses in a paper, use “theses” to indicate the plurality. For example, “The theses presented in this paper all support the idea that…”

Examples of Thesis and Its Plural Form in Sentences

If you are wondering how to use the word “thesis” in a sentence, here are a few examples:

  • Your thesis statement should be clear and concise.
  • The professor asked us to submit our theses by the end of the semester.
  • The thesis of the article is that climate change is caused by human activity.
  • She spent months researching and writing her thesis on the history of feminism .
  • The committee was impressed by the depth and originality of his thesis.

As you can see, “thesis” is used to refer to a statement or argument put forth by a writer or speaker, as well as a research paper written by a student to earn a degree.

Now, let’s take a look at the plural form of “thesis.” According to Grammar Monster, the only correct way to form the plural of “thesis” is “theses.” Here are some examples of how to use “theses” in a sentence:

  • The library has a collection of theses written by graduate students.
  • The professor asked us to read several theses on the topic before starting our own research.
  • The theses presented at the conference covered a wide range of topics.
  • The committee was impressed by the quality and originality of the theses submitted.

Plural Noun Rules for Regular Nouns

When forming the plural of regular nouns, there are some standard rules to follow. These rules apply to most English nouns, including “thesis.” Here are the basic guidelines:

  • For most singular nouns, simply add an “-s” to the end to form the plural. For example, “book” becomes “books,” “car” becomes “cars,” and “house” becomes “houses.”
  • If the singular noun ends in “-s,” “-x,” “-z,” “-ch,” or “-sh,” add “-es” to form the plural. For example, “bus” becomes “buses,” “box” becomes “boxes,” “buzz” becomes “buzzes,” “church” becomes “churches,” and “dish” becomes “dishes.”
  • If the singular noun ends in a consonant followed by “-y,” change the “-y” to “-ies” to form the plural. For example, “city” becomes “cities,” “baby” becomes “babies,” and “story” becomes “stories.”
  • If the singular noun ends in a vowel followed by “-y,” simply add an “-s” to form the plural. For example, “boy” becomes “boys,” “key” becomes “keys,” and “day” becomes “days.”

It’s important to note that there are some irregular nouns that don’t follow these rules. For example, “child” becomes “children,” “foot” becomes “feet,” and “tooth” becomes “teeth.” However, “thesis” is a regular noun, so it follows the standard rules for forming the plural.

Plural Noun Rules for Irregular Nouns

When it comes to forming the plural of nouns in English, there are some general rules that apply to most words. However, there are also many irregular nouns that don’t follow these rules and have unique plural forms. In this section, we’ll go over some common irregular plural nouns and the rules for forming their plurals.

List of Common Irregular Plural Nouns

Here are some examples of irregular plural nouns that you may come across:

Singular Plural
Child Children
Foot Feet
Goose Geese
Man Men
Mouse Mice
Tooth Teeth
Woman Women

Nouns that End in Us

Nouns that end in “us” often have a plural form that ends in “i”. For example:

Singular Plural
Cactus Cacti
Focus Foci
Radius Radii

Nouns that End in Is

Nouns that end in “is” may have a plural form that ends in “es”. For example:

Singular Plural
Analysis Analyses
Basis Bases
Crisis Crises

Nouns that End in On

Nouns that end in “on” may have a plural form that ends in “a”. For example:

Singular Plural
Criterion Criteria
Phenomenon Phenomena
Vertex Vertices

Plurals That Are the Same as Singulars

Some nouns have the same form for both the singular and plural. For example:

Singular Plural
Deer Deer
Fish Fish
Sheep Sheep

Words That Look Like Plural Nouns but Are Singular Nouns

Some words may look like plural nouns but are actually singular nouns. For example:

Singular Plural
News
Mathematics
Physics

Collective Nouns and List

When it comes to forming the plural of nouns, collective nouns can be a bit tricky. A collective noun refers to a group of people or things as a single entity. For example, “team” is a collective noun because it refers to a group of individuals working together towards a common goal.

The challenge with collective nouns is deciding whether to treat them as singular or plural. In American English, collective nouns are usually treated as singular, while in British English, they can be treated as either singular or plural depending on the context.

Here are some examples of collective nouns and how they can be treated in different contexts:

Collective Noun Singular Example Plural Example
audience The audience is enjoying the show. The audience are clapping their hands.
family My family is going on vacation. My family are all different ages.
staff The staff is working hard. The staff are taking their lunch breaks.

As you can see, the choice of whether to use a singular or plural verb depends on whether you are referring to the group as a single entity or as individuals within the group.

When it comes to forming the plural of collective nouns, the same rules apply as for regular nouns. For example, the plural of “team” is “teams”, and the plural of “family” is “families”.

Plural Nouns vs. Possessive Nouns

When it comes to forming the plural of nouns, there are standard rules that apply to most words in the English language. However, there are some exceptions, such as the word “thesis.” The plural of “thesis” is “theses,” and this is the only correct way to form the plural of this word.

On the other hand, when it comes to forming possessive nouns, there are a few rules to keep in mind. Here are some key points to remember:

  • For singular nouns, add an apostrophe and an “s” to show possession. For example, “the thesis’s conclusion” means the conclusion belonging to the thesis.
  • For plural nouns that end in “s,” add only an apostrophe to show possession. For example, “the theses’ conclusions” means the conclusions belonging to the theses.
  • For plural nouns that do not end in “s,” add an apostrophe and an “s” to show possession. For example, “women’s rights” means the rights belonging to women.

It’s important to note that possessive nouns should not be confused with plural nouns. While they may look similar, they serve different grammatical functions. Possessive nouns show ownership or possession, while plural nouns simply refer to more than one of something.

Common Mistakes with Plural Nouns

When it comes to forming the plural of nouns, there are some common mistakes that are made. Here are a few things to keep in mind when forming the plural of the word “thesis” and other nouns:

Adding an Apostrophe

One common mistake is adding an apostrophe to a noun to make it plural. For example, “the thesis’s” instead of “the theses.” This is incorrect and should be avoided.

Irregular Plurals

Some nouns have irregular plurals that do not follow the standard rules. For example, “child” becomes “children” and “goose” becomes “geese.” It is important to learn these irregular plurals to avoid mistakes.

Confusion over Plurals

Some nouns, like “thesis,” can cause confusion over their plural form. “Theses” is the only correct way to make “thesis” plural. Other words that end in “-is” may also have irregular plurals, such as “crisis” becoming “crises.”

Using Incorrect Count Nouns

It is important to use the correct count nouns when referring to multiple instances of something. For example, “studies” instead of “researches,” and “pieces of evidence” instead of “evidences.” Using the incorrect count noun can make your writing sound awkward or confusing.

Frequently Asked Questions

What is the correct plural form of ‘thesis’?

The correct plural form of ‘thesis’ is ‘theses.’ It is an irregular plural noun that does not follow the typical -s/-es suffix used for regular plural nouns.

How is ‘thesis’ used in a sentence?

‘Thesis’ refers to a statement or theory that is put forward as a premise to be maintained or proved. An example sentence would be: “Her thesis on the effects of climate change was well-researched and presented.”

What is the origin of the word ‘thesis’?

The word ‘thesis’ comes from the Greek word ‘tithenai,’ which means ‘to place’ or ‘to put.’ In academia, it refers to a statement or theory that is put forward as a premise to be maintained or proved.

What is the difference between ‘thesis’ and ‘theses’?

‘Thesis’ is the singular form of the word, while ‘theses’ is the plural form. ‘Thesis’ refers to a single statement or theory, while ‘theses’ refers to multiple statements or theories.

The plural of thesis is the word 'theses'.

"}},{"@type":"Question","name":"How do you pluralize thesis?","acceptedAnswer":{"@type":"Answer","text":"

To pluralize 'thesis', you simply add 'es' to the end of the word. This is because 'thesis' ends in 'is', which is a singular noun ending.

"}},{"@type":"Question","name":"Is the plural of thesis 'theses'?","acceptedAnswer":{"@type":"Answer","text":"

Yes, the plural of thesis is 'theses'.

"}},{"@type":"Question","name":"What is the irregular plural form of thesis?","acceptedAnswer":{"@type":"Answer","text":"

'Theses' is not an irregular plural form of thesis. It is a regular plural form.

"}},{"@type":"Question","name":"What are some examples of irregular plural nouns?","acceptedAnswer":{"@type":"Answer","text":"

Some examples of irregular plural nouns include 'child' (children), 'tooth' (teeth), and 'foot' (feet).

"}},{"@type":"Question","name":"How do you correctly pluralize nouns ending in -is?","acceptedAnswer":{"@type":"Answer","text":"

To correctly pluralize nouns ending in -is, you simply change the 'is' to 'es'. For example, the plural of 'thesis' is 'theses', and the plural of 'analysis' is 'analyses'.

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  • 1.1 Etymology
  • 1.2 Pronunciation
  • 1.3.1 Derived terms
  • 1.3.2 Related terms
  • 1.3.3 Translations
  • 1.4 References
  • 1.5 Further reading
  • 1.6 Anagrams
  • 2.1 Etymology
  • 2.2 Pronunciation
  • 3.1 Etymology
  • 3.2 Pronunciation
  • 3.3.1 Declension
  • 3.3.2 Descendants
  • 3.4 References

From Late Middle English thesis ( “ lowering of the voice ” ) [1] and also borrowed directly from its etymon Latin thesis ( “ proposition, thesis; lowering of the voice ” ) , from Ancient Greek θέσῐς ( thésis , “ arrangement, placement, setting; conclusion, position, thesis; lowering of the voice ” ) , from τῐ́θημῐ ( títhēmi , “ to place, put, set; to put down in writing; to consider as, regard ” ) [2] [3] (ultimately from Proto-Indo-European *dʰeh₁- ( “ to do; to place, put ” ) ) + -σῐς ( -sis , suffix forming abstract nouns or nouns of action, process, or result ) . The English word is a doublet of deed .

Sense 1.1 (“proposition or statement supported by arguments”) is adopted from antithesis . [2] Sense 1.4 (“initial stage of reasoning”) was first used by the German philosopher Johann Gottlieb Fichte (1762–1814), and later applied to the dialectical method of his countryman, the philosopher Georg Wilhelm Friedrich Hegel (1770–1831).

The plural form theses is borrowed from Latin thesēs , from Ancient Greek θέσεις ( théseis ) .

Pronunciation

  • ( Received Pronunciation ) IPA ( key ) : /ˈθiːsɪs/ , ( archaic ) /ˈθɛsɪs/
Audio ( ): ( )
  • ( General American ) IPA ( key ) : /ˈθisɪs/
  • Rhymes: -iːsɪs
  • Hyphenation: the‧sis
  • ( Received Pronunciation ) IPA ( key ) : /ˈθiːsiːz/
  • ( General American ) IPA ( key ) : /ˈθisiz/
  • Rhymes: -iːsiːz
  • Hyphenation: the‧ses

thesis ( plural theses )

  • ( rhetoric ) A proposition or statement supported by arguments .
  • 1766 , [ Oliver Goldsmith ], “The Conclusion”, in The Vicar of Wakefield:   [ … ] , volume II, Salisbury, Wiltshire: [ … ] B. Collins, for F [ rancis ] Newbery ,   [ … ] , →OCLC ; reprinted London: Elliot Stock , 1885 , →OCLC , pages 218–219 : I told them of the grave, becoming, and ſublime deportment they ſhould aſſume upon this myſtical occaſion, and read them two homilies and a theſis of my own compoſing, in order to prepare them.
  • ( mathematics , computer science ) A conjecture , especially one too vague to be formally stated or verified but useful as a working convention.
  • ( logic ) An affirmation , or distinction from a supposition or hypothesis .
  • ( philosophy ) In the dialectical method of Georg Wilhelm Friedrich Hegel : the initial stage of reasoning where a formal statement of a point is developed ; this is followed by antithesis and synthesis .
  • ( music , prosody , originally ) The action of lowering the hand or bringing down the foot when indicating a rhythm ; hence, an accented part of a measure of music or verse indicated by this action; an ictus , a stress . Antonym: arsis
  • ( music , prosody , with a reversal of meaning ) A depression of the voice when pronouncing a syllables of a word ; hence, the unstressed part of the metrical foot of a verse upon which such a depression falls , or an unaccented musical note .

Derived terms

  • all but thesis
  • bachelor's thesis
  • Church-Turing thesis
  • conflict thesis
  • doctoral thesis
  • graduate thesis
  • Habakkuk thesis
  • master's thesis
  • Merton thesis
  • private language thesis
  • thesis defense
  • thesis film
  • thesis statement

Related terms

Translations.

  (tʻez)   ,   (tézis),   (palažénnje),   (téza)     (téza),     (tézis)     (leon dim ), (leon tai )   (lùndiǎn),   (lùntí)       ,             ,             (tezisi)       (thésis)       ,       (tēze),   (ろんだい, rondai),   (しゅちょう, shuchō),   (ていりつ, teiritsu) (teje), (nonje), (ronje) (North Korea)     (teza)                 (tɛ́zis),     (položénije)                   ,   ,   ,   ,     (téza),   (tézys),   (polóžennja)  
  (ʔuṭrūḥa)   (atenaxosutʻyun),   (disertacʻia), (diplomayin ašxatankʻ)     (dysjertácyja),   (dysertácyja),   (dyplómnaja rabóta)     (disertácija)     ,     (leon man )   (lùnwén)     ,       ,     ,       ,   ;   ;           ,   (diserṭacia)     ,     ,     ,     ,     ,     (only a doctoral thesis) (mahāśodh nibandh)     (téza)   ,   (postgraduate),           (ろんぶん, ronbun) (dissertasiä), (diplomdyq jūmys)   (nɨkkheepaʼbɑt)   (nonmun),   (ronmun) (North Korea) (dissertatsiya)   (wi tha nyā ni phon)         (disertacija)   or     , (pâyân-nâme),       ,           ,         (dissertácija),   (diplómnaja rabóta)         ,     ,         ,     (dissertatsiya)   (wít-tá-yaa-ní-pon),   (bpà-rin-yaa-ní-pon),   (ní-pon)   , ,   (dysertácija),   (dyplómna robóta)   , ,  
  (thésis)  
  • ^ “ thē̆sis, n. ”, in MED Online , Ann Arbor, Mich.: University of Michigan , 2007 .
  • ^ “ thesis, n. ”, in Lexico , Dictionary.com ; Oxford University Press , 2019–2022 .

Further reading

  • “ thesis ”, in The Century Dictionary   [ … ] , New York, N.Y.: The Century Co. , 1911 , →OCLC .
  • “ thesis ”, in Webster’s Revised Unabridged Dictionary , Springfield, Mass.: G. & C. Merriam , 1913 , →OCLC .
  • Heists , Sethis , heists , shiest , shites , sithes , thises

From Latin thesis , from Ancient Greek θέσις ( thésis , “ a proposition, a statement, a thing laid down, thesis in rhetoric, thesis in prosody ” ) .

Audio: ( )

thesis   f ( plural theses or thesissen , diminutive thesisje   n )

  • Dated form of these . Synonyms: dissertatie , proefschrift , scriptie

From Ancient Greek θέσις ( thésis , “ a proposition, a statement, a thing laid down, thesis in rhetoric, thesis in prosody ” ) .

  • ( Classical Latin ) IPA ( key ) : /ˈtʰe.sis/ , [ˈt̪ʰɛs̠ɪs̠]
  • ( modern Italianate Ecclesiastical ) IPA ( key ) : /ˈte.sis/ , [ˈt̪ɛːs̬is]

thesis   f ( genitive thesis ) ; third declension

Case Singular Plural

Descendants

  • → Dutch: thesis
  • → Armenian: թեզ ( tʻez )
  • → Dutch: these
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  • → Romanian: teză
  • → Turkish: tez
  • Galician: tese
  • Italian: tesi
  • English: thesis
  • Portuguese: tese
  • Spanish: tesis
  • “ thesis ”, in Charlton T. Lewis and Charles Short ( 1879 ) A Latin Dictionary , Oxford: Clarendon Press
  • thesis in Gaffiot, Félix ( 1934 ) Dictionnaire illustré latin-français , Hachette.

thesis is plural

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Definition of thesis noun from the Oxford Advanced Learner's Dictionary

  • Students must submit a thesis on an agreed subject within four years.
  • He presented this thesis for his PhD.
  • a thesis for a master's degree
  • He's doing a doctoral thesis on the early works of Shostakovich.
  • Many departments require their students to do a thesis defense.
  • She completed an MSc by thesis.
  • her thesis adviser at MIT
  • in a/​the thesis
  • thesis about

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Find out which words work together and produce more natural-sounding English with the Oxford Collocations Dictionary app. Try it for free as part of the Oxford Advanced Learner’s Dictionary app.

thesis is plural

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This synthesis is based on public domain data, including published papers, and dissertations.
The book is a compilation of doctoral candidates' dissertations and .
Today, most universities require their students to submit electronic and dissertations for their graduation.
They can continue classes or use the research as their master's and doctoral dissertations.
Leuthner was fiercely attacked for his at the time by social democratic leader Karl Kautsky.
Many scientists, including people writing doctoral , had access to the bones, and they were laboriously studied.

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Bachelor thesis or Bachelor's thesis

During my final year at university, I wrote what I thought was a "bachelor thesis". Right before printing it I stumbled upon several documents stating the name "bachelor's thesis". (Here we do not call it a dissertation just yet, so this question is only about the possessive bachelor's vs. bachelor .) A couple of Google search queries later, I had not found out which of these terms is correct. Which should I use?

  • word-choice
  • differences

James Waldby - jwpat7's user avatar

  • 2 It's a master's thesis and a doctoral thesis. Going by these, it should be a bachelor's thesis or a bacheloral thesis . Except bacheloral isn't a word. What is the adjective form for bachelor? Oh, it's bachelor. So by analogy, it's either a bachelor's thesis or a bachelor thesis . I think both should be fine. –  Peter Shor Commented Jul 19, 2012 at 16:06

4 Answers 4

First off, I would mimic the term that your university uses. Does that give you a satisfactory resolution? (Or are they inconsistent in their use?)

If not, do you use the full term "Bachelor of Arts" or "Bachelor of Science" in your thesis title? If so, you don't need the apostrophe s (and you should capitalize the words as indicated). However, if you are referring to the degree program more informally, then I think you should use "bachelor's thesis." ( See this Wikipedia entry in which bachelor's is used throughout.)

Also, the Associated Press Styleguide has these guidelines for Academic Degrees:

  • Use an apostrophe in bachelor’s degree, a master’s, etc.
  • There is no apostrophe in Bachelor of Arts or Master of Science.

I think that would apply to bachelor's thesis as well.

JLG's user avatar

  • Inconsistency is the problem. I have seen both versions come up, so it's not about being correct with respect to the university, it's more a question of my curiosity. As BA/BSc is concerned, we do not distinguish between them, we're simply bachelors. I read through some style guides, but none of them address theses specifically, so I was not sure about its application based on "bachelor's degree" and other uses. So your implication may or may not be correct. Still it's the closest I got to a backed answer. –  Ondrej Commented May 10, 2012 at 10:25

In some countries/universities, the word "thesis" or a cognate is used as part of a bachelor's or master's course, while "dissertation" is normally applied to a doctorate, while in others, the reverse is true.

In USA and Canada,

  • Research-based papers presented as the final empirical study of a bachelor with honours (honors) degree are normally called bachelor thesis or honours thesis (in USA, "thesis" is in more commonly use).
  • Major papers presented as the final project for a master's degree are normally called thesis .
  • Major papers presenting the student's research towards a doctoral degree are called theses or dissertations .

In Germany,

  • A bachelor's thesis is often 40–60 pages long, other theses are usually even longer.
  • The required submission for the doctorate is called a Dissertation or Doktorarbeit.

Fr0zenFyr's user avatar

  • 4 1) This does not address my issue at all. As I said, it's not about thesis/dissertation, regional specifics, ..., it's only about the first word of the term. 2) The whole answer is only a compilation of excerpts from the "Thesis" Wikipedia entry. Don't worry, read that already. –  Ondrej Commented May 10, 2012 at 10:19
  • Ahem... I double-checked Mac's Oxford dictionaries and they confirm that "thesis" is singular and "theses" is plural; your answer suggests a semantic difference. I've suggested a minimal edit to make the answer consistent with this. –  Blaisorblade Commented Jun 26, 2016 at 15:07

As I understand it, you are the bachelor (or at least the bachelor candidate) by virtue of being on the course, and the thesis is yours, so bachelor's thesis is the correct way to go.

On the thesis/dissertation thing, a thesis is your argument or proposition, and a dissertation is the discourse you defend it with.

Roaring Fish's user avatar

At the college I attended, we used the terms Senior Paper or Senior Thesis to describe that it occurs in the final year of schooling. There are no post-graduate programs at the college in question, which avoided confusion with doctoral or master's level work.

Nomenclature of this final year thesis will vary depending on the institution.

Zoot's user avatar

Not the answer you're looking for? Browse other questions tagged word-choice differences or ask your own question .

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thesis is plural

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As nouns the difference between thesis and theses, derived terms, related terms, external links.

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thesis noun

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What does the noun thesis mean?

There are seven meanings listed in OED's entry for the noun thesis . See ‘Meaning & use’ for definitions, usage, and quotation evidence.

thesis has developed meanings and uses in subjects including

Entry status

OED is undergoing a continuous programme of revision to modernize and improve definitions. This entry has not yet been fully revised.

How common is the noun thesis ?

How is the noun thesis pronounced?

British english, u.s. english, where does the noun thesis come from.

Earliest known use

Middle English

The earliest known use of the noun thesis is in the Middle English period (1150—1500).

OED's earliest evidence for thesis is from before 1398, in a translation by John Trevisa, translator.

thesis is a borrowing from Greek.

Etymons: Greek θέσις .

Nearby entries

  • thesaurus, n. 1823–
  • thesaury, n. a1639–1708
  • these, n. a1600–48
  • these, pron. & adj. Old English–
  • Thesean, adj. 1815–
  • Theseid, n. 1725–
  • Theseium, n. 1819–
  • these-like, adj. 1644–
  • thesial, adj. 1654
  • thesicle, n. 1863–
  • thesis, n. a1398–
  • thesis-novel, n. 1934–
  • thesis-play, n. 1902–
  • thesmophilist, n. 1644–
  • Thesmophorian, adj. 1891–
  • Thesmophoric, adj. 1788–
  • thesmothete, n. 1603–
  • thesocyte, n. 1887–
  • thesp, n. 1962–
  • Thespian, adj. & n. 1675–
  • Thespianism, n. 1914–

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Meaning & use

Pronunciation, compounds & derived words, entry history for thesis, n..

thesis, n. was first published in 1912; not yet revised.

thesis, n. was last modified in December 2023.

Revision of the OED is a long-term project. Entries in oed.com which have not been revised may include:

  • corrections and revisions to definitions, pronunciation, etymology, headwords, variant spellings, quotations, and dates;
  • new senses, phrases, and quotations which have been added in subsequent print and online updates.

Revisions and additions of this kind were last incorporated into thesis, n. in December 2023.

Earlier versions of this entry were published in:

OED First Edition (1912)

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Is thesis plural

Thesis is both plural and singular singular singular both plural and singular both plural and singular singular plural plural plural .

The plural singular plural singular plural singular plural singular plural of thesis is theses .

How to say thesis: How to pronounce thesis

How to say theses: How to pronounce theses

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Not sure why thesis is both singular singular both both singular plural plural plural ?   Contact Us !   We'll explain.

1.  What makes words plural? 2.  What makes a word singular? 3.  How to make acronyms plural.

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As a graduate student, you may need to complete a thesis or dissertation as part of your program's graduation requirements. While theses are common among master’s students and dissertations among doctoral students, this may not apply universally across all programs. We encourage you to reach out to your program adviser to determine the specific requirements for your culminating project.

Office of Theses and Dissertations

The Office of Theses and Dissertations is the unit of the Graduate School responsible for certifying that theses and dissertations have been prepared in accordance with formatting requirements established by the Graduate School, the University Libraries, and the graduate faculty of Penn State. We are here to help you navigate the review and approval process to ensure you are able to graduate on time.

Cover of the 2023-2024 Penn State Graduate School Thesis and Dissertation Handbook

The Thesis and Dissertation Handbook explains Penn State formatting requirements for all master’s theses and doctoral dissertations. It covers the submission process and approval deadlines, the responsibilities of each student, and provides page examples. We highly recommend all students doing theses or dissertations to carefully review the handbook.

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Questions about theses, dissertations, or Graduate School commencement should be directed to the Graduate School Office of Theses and Dissertations (OTD) .

115 Kern Graduate Building University Park, PA 16802

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814-865-1795

Among these resources, you can get help from the Graduate Writing Center and the Statistical Counseling Center, notify the University of your intent to graduate, and prepare for Commencement.

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Announcing the 2024–25 Collaborative Research Grantees and Projects

The Center for Digital Humanities is thrilled to announce the three project proposals awarded 2024–25 Collaborative Research Grants .

This year’s projects are “Princeton Open HTR Initiative: Creating Infrastructure for Modeling Historical Texts” ( Marina Rustow , Khedouri A. Zilkha Professor of Jewish Civilization in the Near East, Professor of Near Eastern Studies and History, Director of the Geniza Lab; Helmut Reimitz , Shelby Cullom Davis ’30 Professor of European History, Professor of History; Christine Roughan , Postdoctoral Research Associate, The Center for Digital Humanities and Manuscript, Rare Book and Archive Studies), “Marxism’s Marx” ( Edward Baring , Associate Professor of History and Human Values), and “Music Theory in the Plural” ( Anna Yu Wang , Assistant Professor of Music; Jürgen Hackl , Assistant Professor of Civil and Environmental Engineering).

Grantees will work with a team of CDH Research Software Engineers and Project Managers to develop methods and software to aid their research. “We are excited by the focus on multilingual research questions, as well as the engagement with AI approaches,” says Jeri Wieringa (Assistant Director, CDH). “These six-month partnerships enable us to contribute to a wide variety of faculty projects while also developing more generalized methods in the areas of text reuse and large language models (LLMs).” This year’s application process prioritized projects exploring opportunities and/or limits of AI for humanities research.

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Above (clockwise from top left): Marina Rustow; Helmut Reimitz; Christine Roughan; Edward Baring; Jürgen Hackl; and Anna Yu Wang

Princeton Open HTR Initiative: Creating Infrastructure for Modeling Historical Texts

In their proposal, Marina Rustow (Khedouri A. Zilkha Professor of Jewish Civilization in the Near East, Professor of Near Eastern Studies and History, Director of the Geniza Lab), Helmut Reimitz (Shelby Cullom Davis ’30 Professor of European History, Professor of History), and Christine Roughan (Postdoctoral Research Associate, The Center for Digital Humanities and Manuscript, Rare Book and Archive Studies) wrote:

The Princeton Open HTR Initiative is a research infrastructure project to pilot a Princeton-specific instance of the eScriptorium handwritten text recognition (HTR) software. While the digitization efforts of recent decades have revolutionized access to historical texts in libraries, archives, and cultural heritage institutions, HTR is making these digitized materials machine-readable, opening them up to text search and computational analysis at scale. An increasing number of humanities scholars – including at Princeton – are eager to integrate HTR into their research workflows. However, barriers to entry can be significant, particularly in technical expertise and cost.

Starting this summer, the CDH team will focus on the technical design of a pilot instance of the open-source eScriptorium software configured to work with the Princeton high-performance computing environment. The goal is to undertake the initial research and development to determine if a central resource for handwritten text recognition is possible.

Marxism’s Marx

In his proposal, Edward Baring (Associate Professor of History and Human Values) wrote:

The global success of Marxism is one of the most important developments in modern intellectual history. By the mid-twentieth century, Marxist ideas had come to inform thinkers and activists on every inhabited continent, with enormous consequences for local and global politics. However, the international diffusion of Marx’s texts and the appeal of his ideas around the world were by no means preordained, for Marx had focused his analytical attention on the economic histories and conditions of Western Europe. This project aims to build a resource that will help scholars study this development by allowing them to understand how Marxists globally drew from Marx’s corpus of writings.

Beginning in the Fall of 2024, the CDH team will focus on developing methods for identifying quotations from Marx within a small subset of Marxist literature. The goal is to lay the methodological groundwork for the larger project of identifying the uses of Marx within a multilingual corpus of Marxist literature.

Music Theory in the Plural

In their proposal, Anna Yu Wang (Assistant Professor of Music) and Jürgen Hackl (Assistant Professor of Civil and Environmental Engineering) wrote:

Despite the enormous diversity of musical phenomena that exist across historical and cultural spaces, the majority of music-theoretical and scientific approaches in music studies have focused on interpretations of Western canonical source materials, neglecting a vast dataset of source documents from underrepresented languages and communities (Agawu 2003; Stover, Tilley, and Yu Wang 2020). To date, most global discourse on music theory remains untranslated, which limits the possibility of building equitable relationships among global music communities and privileges intellectual traditions occurring in European languages, particularly English.

In Spring 2025, the CDH team will focus on assessing the use of multilingual LLMs for tracking concepts between texts, based on a controlled vocabulary developed by the project PIs. The goal is to assess and develop the capacity to link concepts in music-theoretical texts across languages as part of a larger project to expand the “canon” of music theory.

We look forward to sharing more about each project as they begin in the coming months!

For more information about Collaborative Research Grants, past projects and grantees, and the application process, please visit https://cdh.princeton.edu/engage/grants/cdh-research-grants/ .

COMMENTS

  1. The Plural of Thesis

    "Theses" is the only way to make the noun "thesis" plural. Confusion arises because some mistakenly believe that all nouns ending in "s" should form a plural that adds "es" to the end of the word. When a noun ends with "is," you need to replace the "is" with an "es" to form the plural. This is because its plural form derives from Greek.

  2. Thesis Definition & Meaning

    The meaning of THESIS is a dissertation embodying results of original research and especially substantiating a specific view; especially : one written by a candidate for an academic degree. ... But a thesis may also be an idea; so in the course of the paper the student may put forth several theses (notice the plural form) and attempt to prove ...

  3. What Is the Plural of Thesis

    Thesis becomes theses in plural form for two reasons: 1) The word thesis has a Greek root, and theses is how it is pluralized in that original language. 2) There are many English words ending with -is that take on -es endings when pluralized: e.g., crisis becomes crises. The pluralization isn't all that unique.

  4. What's the Plural of Thesis? (Thesises? Theses?)

    What's the plural of "thesis"? Thesis, (and its plural theses) is an example of one of the many common English words that has roots elsewhere. In this case, thesis is a word that has roots all the way back to Ancient Greek. Like other similarly structured words: diagnosis, synthesis, analysis, oasis, crisis, nemesis and the like, thesis is by no means the only frequently used Greek word ...

  5. THESES

    THESES definition: 1. plural of thesis 2. plural of thesis . Learn more.

  6. THESIS Definition & Meaning

    Thesis definition: a proposition stated or put forward for consideration, especially one to be discussed and proved or to be maintained against objections. See examples of THESIS used in a sentence.

  7. THESIS

    THESIS definition: 1. a long piece of writing on a particular subject, especially one that is done for a higher…. Learn more.

  8. Plural of Thesis: A Quick Guide for English Learners

    The plural of thesis is "theses.". In English, most nouns form the plural by adding an "s" at the end. However, "thesis" is one of the few exceptions to this rule. The word "thesis" has a Greek root, and "theses" is how it is pluralized in that original language. Singular.

  9. thesis

    thesis (plural theses) Senses relating to logic, rhetoric, etc. ( rhetoric) A proposition or statement supported by arguments. (by extension) A lengthy essay written to establish the validity of a thesis (sense 1.1), especially one submitted in order to complete the requirements for a non- doctoral degree in the US and a doctoral degree in the ...

  10. THESIS

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  11. thesis noun

    Collocations Scientific research Scientific research Theory. formulate/ advance a theory/ hypothesis; build/ construct/ create/ develop a simple/ theoretical/ mathematical model; develop/ establish/ provide/ use a theoretical/ conceptual framework; advance/ argue/ develop the thesis that…; explore an idea/ a concept/ a hypothesis; make a prediction/ an inference

  12. THESIS definition in American English

    thesis in American English. (ˈθisɪs) noun Word forms: plural -ses (-siz) 1. a proposition stated or put forward for consideration, esp. one to be discussed and proved or to be maintained against objections. He vigorously defended his thesis on the causes of war. 2. a subject for a composition or essay. 3.

  13. Whats the Plural of Thesis: Understanding Singular and Plural Forms

    The plural of "thesis" adheres to the Greek-rooted pattern, changing the singular -is to a plural -es. Accurate use of "thesis" and "theses" reflects scholarly precision in both written and oral communication. Awareness of correct pluralization extends to other similar nouns ending in -sis, emphasizing the importance of understanding language origins.

  14. What is the plural of thesis?

    The plural form of thesis is theses . Find more words! The book is a compilation of doctoral candidates' dissertations and theses. Today, most universities require their students to submit electronic theses and dissertations for their graduation. Many scientists, including people writing doctoral theses, had access to the bones, and they were ...

  15. Thesis Definition & Meaning

    plural theses / ˈθiːˌsiːz/. Britannica Dictionary definition of THESIS. [count] 1. : a long piece of writing on a particular subject that is done to earn a degree at a university. She wrote her thesis on Renaissance Nativity scenes. a master's/doctoral thesis on the effects of global warming. 2. formal : a statement that someone wants to ...

  16. THESIS definition and meaning

    7 meanings: 1. a dissertation resulting from original research, esp when submitted by a candidate for a degree or diploma 2. a.... Click for more definitions.

  17. word choice

    3. As I understand it, you are the bachelor (or at least the bachelor candidate) by virtue of being on the course, and the thesis is yours, so bachelor's thesis is the correct way to go. On the thesis/dissertation thing, a thesis is your argument or proposition, and a dissertation is the discourse you defend it with. Share.

  18. THESES

    THESES meaning: 1. plural of thesis 2. plural of thesis . Learn more.

  19. Theses or Thesis

    Noun. ( theses ) A statement supported by arguments. A written essay, especially one submitted for a university degree. * Goldsmith. I told them of the grave, becoming, and sublime deportment they should assume upon this mystical occasion, and read them two homilies and a thesis of my own composing, to prepare them. (logic) An affirmation, or ...

  20. thesis, n. meanings, etymology and more

    There are seven meanings listed in OED's entry for the noun thesis. See 'Meaning & use' for definitions, usage, and quotation evidence. thesis has developed meanings and uses in subjects including. prosody (Middle English) music (Middle English) rhetoric (late 1500s) logic (late 1500s) education (late 1700s) philosophy (1830s)

  21. Is thesis plural?

    The singular plural plural singular plural plural singular plural singular of thesis is theses. How to say thesis: How to pronounce thesis. How to say theses: How to pronounce theses. Cite This Source. Not sure why thesis is singular both singular singular plural both plural plural both? Contact Us! We'll explain.

  22. Thesis

    Etymology. The term thesis comes from the Greek word θέσις, meaning "something put forth", and refers to an intellectual proposition. Dissertation comes from the Latin dissertātiō, meaning "discussion". Aristotle was the first philosopher to define the term thesis.. A 'thesis' is a supposition of some eminent philosopher that conflicts with the general opinion...for to take notice when ...

  23. Theses and Dissertations

    Office of Theses and Dissertations. The Office of Theses and Dissertations is the unit of the Graduate School responsible for certifying that theses and dissertations have been prepared in accordance with formatting requirements established by the Graduate School, the University Libraries, and the graduate faculty of Penn State.

  24. Announcing the 2024-25 Collaborative Research Grantees and Projects

    The Center for Digital Humanities is thrilled to announce the three project proposals awarded 2024-25 Collaborative Research Grants.. This year's projects are "Princeton Open HTR Initiative: Creating Infrastructure for Modeling Historical Texts" (Marina Rustow, Khedouri A. Zilkha Professor of Jewish Civilization in the Near East, Professor of Near Eastern Studies and History, Director ...