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Theory
English
Etymology
French théorie, from Latin theoria, from Greek theöria.
Noun
theory (plural theories)
- An unproven conjecture.
- I have a theory about who broke into the school last night, but it's just a theory.
- An expectation of what should happen, barring unforseen circumstances.
- So we'll be there in three hours?
- That's the theory.
- (science) A coherent statement or set of statements that attempts to explain observed phenomena, and which has testable implications.
- There is now a well-developed theory of electrical charge.
- (mathematics, uncountable) A field of study attempting to exhaustively describe a particular class of constructs.
- Knot theory classifies the mappings of a circle into 3-space.
- (logic) A set of axioms, together with all statements derivable from them.
- A theory is consistent if it has a model.
Translations to be checked
- Chinese: 論 / 论 (lun), 學説 / 学说 (xueshuo); 理論 / 理论 (lilun), 道理 (daoli)
- Dutch: theorie
- Finnish: teoria
- French: théorie f
- Indonesian: teori
- Italian: teoria f
- Japanese: 1. 理論 (りろん, riron), 学説 (がくせつ, gakusetsu); 2. 定理 (ていり, teiri); 推測 (すいそく, suisok), 見解 (けんかい), 意見 (いけん)
- Swedish: teori
Related terms
- complexity theory
- domino theory
- graph theory
- in theory
- information theory
- music theory
- knot theory
- set theory
- theorem
- theoretical
- theorise /theorize
See also
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