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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 23 Dec. 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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[ 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

And when she says, “The only thing you can do is to look away,” that really felt to me like almost a thesis statement for the film.

In the special category, the dance doesn’t have to be on a personal Ph.D. thesis, but it should still convey a paper, a talk, or research project on AI research and quantum science.

These two similar shots become the thesis of this faithful sequel.

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.

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.

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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

Want to learn more?

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.

Nearby words

Definition of 'thesis'

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thesis in American English

Thesis in british english, examples of 'thesis' in a sentence thesis, related word partners thesis, trends of thesis.

View usage over: Since Exist Last 10 years Last 50 years Last 100 years Last 300 years

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
• 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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Meaning of thesis – Learner’s Dictionary

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thesis noun [C] ( WRITING )

Thesis noun [c] ( idea ).

(Definition of thesis from the Cambridge Learner's Dictionary © Cambridge University Press)

Translations of thesis

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to move so close to someone or something that the person or thing cannot move away

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