Bedeutung von “thesis” — Learner’s Dictionary

thesis

noun [ C ] us uk /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 thesis
IDEA formal

a theory that is suggested and can then be argued with or agreed with:

That is the central thesis of the book.

(Definition von “thesis” aus dem Cambridge Learner's Dictionary © Cambridge University Press)