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Definition of thesis

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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

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 17 Nov. 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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Meaning of thesis in English

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  • I wrote my thesis on literacy strategies for boys .
  • Her main thesis is that children need a lot of verbal stimulation .
  • boilerplate
  • composition
  • corresponding author
  • dissertation
  • essay question
  • peer review

You can also find related words, phrases, and synonyms in the topics:

thesis | Intermediate English

Examples of thesis, collocations with thesis.

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Translations of thesis

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what is the mean thesis

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Definition of 'thesis'

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thesis in British English

Thesis in american english, examples of 'thesis' in a sentence thesis, cobuild collocations thesis, trends of thesis.

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In other languages thesis

  • American English : thesis / ˈθisɪs /
  • Brazilian Portuguese : tese
  • Chinese : 论点
  • European Spanish : tesis
  • French : thèse
  • German : These
  • Italian : tesi
  • Japanese : 主張
  • Korean : 논지
  • European Portuguese : tese
  • Latin American Spanish : tesis
  • Thai : ข้อสมมุติ, ข้อวินิจฉัย

Browse alphabetically thesis

  • thesis play
  • thesmothete
  • All ENGLISH words that begin with 'T'

Related terms of thesis

  • academic thesis
  • central thesis
  • doctoral thesis
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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 June 2024.

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 June 2024.

Earlier versions of this entry were published in:

OED First Edition (1912)

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OED Second Edition (1989)

  • View thesis in OED Second Edition

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Citation details

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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

My approach to planning a restaurant and creating recipes is similar to structuring a thesis or an essay.

"There's absolutely no way that I would task myself in trying to give the ultimate or comprehensive thesis of Africa - that's crazy!" she said.

As well as his music career, May is known for his animal rights activism, and earned a PhD in astrophysics in 2007, 36 years after abandoning his thesis when the band took off.

However, its supporters also view the state’s response as evidence of one of their central theses: that far-right activists are disproportionally targeted compared to people with different backgrounds and ideologies.

The yacht's name is understood to be based on the Bayesian theory, which Mr Lynch's PhD thesis was based on.

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.

COMMENTS

  1. 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. How to use thesis in a sentence.

  2. THESIS

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

  3. THESIS

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

  4. What Is a Thesis?

    Revised on April 16, 2024. A thesis is a type of research paper based on your original research. It is usually submitted as the final step of a master's program or a capstone to a bachelor's degree. Writing a thesis can be a daunting experience. Other than a dissertation, it is one of the longest pieces of writing students typically complete.

  5. What is a thesis

    A thesis is an in-depth research study that identifies a particular topic of inquiry and presents a clear argument or perspective about that topic using evidence and logic. Writing a thesis showcases your ability of critical thinking, gathering evidence, and making a compelling argument. Integral to these competencies is thorough research ...

  6. 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.

  7. Thesis

    A thesis is the most important or foundational idea of an argument. If the thesis of your paper is that chocolate ice cream is better than vanilla, you'll need to back that up with plenty of sundae-based research. ... One definition of thesis is that it is the most important or foundational idea of an argument, presentation, or piece of writing ...

  8. thesis, n. meanings, etymology and more

    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)

  9. 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 ...

  10. 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.