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English definition of “thesis”

thesis

noun [C]     /ˈθiːsɪs/ (plural theses /ˈθiːsiːz/)
WRITING B2 a long piece of writing that you do as part of an advanced university course : a master's/ PhD thesisPapers and compositionsOfficial documentsSchool and vocational qualifications
IDEA formal a theory that is suggested and can then be argued with or agreed with: That is the central thesis of the book .Topics and areas of interest
(Definition of thesis noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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