theory - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “theory”

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theory

noun [C/U]  us   /ˈθɪər·i, ˈθi·ə·ri/
something suggested as a reasonable explanation for facts, a condition, or an event, esp. a systematic or scientific explanation: [U] Adele took a course in modern political theory. [C] I have a theory (= an opinion) about why everybody in the city is in such a hurry.
Idioms
Translations of “theory”
in Arabic نَظَرِيّة…
in Korean 이론…
in Malaysian teori…
in French théorie…
in Turkish kuram, teori…
in Italian teoria…
in Chinese (Traditional) 理論, 學說, 意見…
in Russian теория…
in Polish teoria…
in Vietnamese lý thuyết, lý luận, nguyên lý…
in Spanish teoría…
in Portuguese teoria…
in Thai สมมติฐาน, ทฤษฎี…
in German die Theorie…
in Catalan teoria…
in Japanese 理論, 説…
in Indonesian teori…
in Chinese (Simplified) 理论, 学说, 意见…
(Definition of theory from the Cambridge Academic Content Dictionary © Cambridge University Press)
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