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English definition of “thesis”

thesis

noun [C]     /ˈθiː.sɪs/ (plural theses   /ˈθiː.siːz/   )
B2 a long piece of writing on a particular subject , especially one that is done for a higher college or university degree : a doctoral thesis (= for a PhD )Papers and compositions C2 formal the main idea , opinion , or theory of a person , group , piece of writing, or speech : Their main thesis was that war was inevitable .Topics and areas of interest
(Definition of thesis noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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