theory Meaning in the Cambridge Learner’s Dictionary Cambridge dictionaries logo
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “theory” - Learner’s Dictionary

theory

noun     /ˈθɪəri/
IDEA [C]
B2 an idea or set of ideas that is intended to explain something: Darwin's theory of evolutionPhilosophyIdeas, concepts and theories
PRINCIPLES [U]
the set of principles on which a subject is based: economic theoryPhilosophyIdeas, concepts and theories
in theory
B2 If something is possible in theory, it should be possible but often it does not happen this way: In theory, the journey should be shorter but in practice, the roadworks slow you down.Ideas, concepts and theories
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 Learner’s Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website
European Union – in or out? The language of the UK’s referendum
European Union – in or out? The language of the UK’s referendum
by ,
June 22, 2016
by Liz Walter On June 23rd, Britain will decide whether or not to remain part of the European Union (EU). I’m more than happy to bore friends with my own views on the subject, but the purpose of this post is simply to highlight the language of the debate. The precise question we will be answering

Read More 

Word of the Day

be as thick as thieves

to be very close friends and share secrets, etc.

Word of the Day

creeping obesity noun
creeping obesity noun
June 27, 2016
obesity which results from incremental weight gain over a number of years More than just a holiday glow: Experts reveal taking a vacation can actually save your LIFE (but there is still a risk of ‘creeping obesity’)

Read More