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Meaning of “theory” in the English Dictionary

"theory" in British English

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theorynoun [C or U]

uk   /ˈθɪə.ri/ us   /ˈθɪr.i/
B2 a formal statement of the rules on which a subject of study is based or of ideas that are suggested to explain a fact or event or, more generally, an opinion or explanation: economic theory scientific theory Darwin's theory of evolution He has a theory that the hole was caused by a meteorite.
in theory
B2 If something is possible in theory, it should be possible, but often it does not happen in that way: In theory, the journey should take three hours, but in practice it usually takes four because of roadworks.

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(Definition of theory from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"theory" in American English

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theorynoun [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
(Definition of theory from the Cambridge Academic Content Dictionary © Cambridge University Press)

"theory" in Business English

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theorynoun

uk   /ˈθɪəri/ us   plural theories
[C or U] a formal statement of ideas that are suggested to explain a fact or event, or how something works: He has four theories to explain organizational change and development.economic/political theory Economic theory says that there is little connection between the euro's value against the dollar or the yen and the success of monetary union itself.a theory of sth In this article the authors develop a theory of high-performing organizations.
[C or U] a formal statement of the rules or principles on which an activity or a subject of study is based: management/organization theory This case study has important implications for management theory the theory and practice of running a department
[C] a statement of an opinion or an explanation of an idea that is believed to be true, but might be wrong: The theory is that staff react better to praise than to criticism. People will buy the product if you put it in the right place - well, that's the theory anyway.
in theory
if something is possible in theory, it should be possible, but often it does not happen in that way: In theory, you can be up and trading in a just a day. Employing fewer people sounds great in theory, but how's it going to work out in practice?
(Definition of theory from the Cambridge Business English Dictionary © Cambridge University Press)
Translations of “theory”
in Korean 이론…
in Arabic نَظَرِيّة…
in Malaysian teori…
in French théorie…
in Russian теория…
in Chinese (Traditional) 理論, 學說, 意見…
in Italian teoria…
in Turkish kuram, teori…
in Polish teoria…
in Spanish teoría…
in Vietnamese lý thuyết, lý luận, nguyên lý…
in Portuguese teoria…
in Thai สมมติฐาน, ทฤษฎี…
in German die Theorie…
in Catalan teoria…
in Japanese 理論, 説…
in Chinese (Simplified) 理论, 学说, 意见…
in Indonesian teori…
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“theory” in Business English

Avoiding common errors with the word enough.
Avoiding common errors with the word enough.
by ,
May 25, 2016
by Liz Walter Enough is a very common word, but it is easy to make mistakes with it. You need to be careful about its position in a sentence, and the prepositions or verb patterns that come after it. I’ll start with the position of enough in the sentence. When we use it with a noun,

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