Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “thesis”

thesis

noun [C]  /ˈθi·sɪs/ (plural theses  /ˈθi·siz/) us  
a piece of writing involving original study of a subject, esp. for a college or university degree: a master’s thesis A thesis is also the main idea, opinion, or theory of a speaker or writer, who then attempts to prove it: His thesis was that World War I could have been avoided.
(Definition of thesis from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of thesis?
Add Cambridge dictionaries to your browser to your website

Definitions of “thesis” in other dictionaries

Word of the Day

pint

a measure for liquid equal to about half a litre

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More