Date: 1300-1400
Language: Latin
Origin: Greek, 'act of laying down', from tithenai 'to put, lay down'


theā€§sis plural theses [countable]
1SEC a long piece of writing about a particular subject that you do as part of an advanced university degree such as an MA or a PhD:
Cynthia's still working on her thesis.
graduate/master's/doctoral thesis
He wrote his doctoral thesis on contemporary French literature.
2 formal an idea or opinion about something, that you discuss in a formal way and give examples for:
Their main thesis was that the rise in earnings was due to improvements in education.
3 American English in writing, the thesis is the sentence or group of sentences which state what the main idea of an essay is:
a paragraph introducing your thesis statement

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