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1. Dictionary

   theory

   /ˈθɪəri/

   noun

   • 1. a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained: "Darwin's theory of evolution" Similar hypothesisthesisconjecturesuppositionspeculationpostulationpostulatepropositionpremisesurmiseassumptionpresumptionpresuppositionnotionguesshunchfeelingsuspicionopinionviewbeliefthinkingthought(s)judgementcontentionprinciplesideasconceptsprincipled explanationslawsphilosophyideologysystem of ideasscience
   • ▪ a set of principles on which the practice of an activity is based: "a theory of education"
   • ▪ an idea used to account for a situation or justify a course of action: "my theory would be that the place has been seriously mismanaged"
   • ▪ a collection of propositions to illustrate the principles of a subject.

   Word Origin late 16th century (denoting a mental scheme of something to be done): via late Latin from Greek theōria ‘contemplation, speculation’, from theōros ‘spectator’.

   Scrabble Points: 12

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2. dictionary.cambridge.org › dictionary › englishTHEORY | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   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.

3. www.merriam-webster.com › dictionary › theoryTheory Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › theory

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   The meaning of THEORY is a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena. How to use theory in a sentence. The Difference Between Hypothesis and Theory Two Related, Yet Distinct, Meanings of Theory Synonym Discussion of Theory.

4. en.wikipedia.org › wiki › TheoryTheory - Wikipedia

   en.wikipedia.org › wiki › Theory

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   A theory is a rational type of abstract thinking about a phenomenon, or the results of such thinking. The process of contemplative and rational thinking is often associated with such processes as observational study or research. Theories may be scientific, belong to a non-scientific discipline, or no discipline at all.

5. www.dictionary.com › browse › TheoryTHEORY Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › Theory

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   Theory definition: a coherent group of tested general propositions, commonly regarded as correct, that can be used as principles of explanation and prediction for a class of phenomena. See examples of THEORY used in a sentence.

6. www.collinsdictionary.com › dictionary › englishTHEORY definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   A theory is a formal idea or set of ideas that is intended to explain something. Marx produced a new theory about historical change based upon conflict. Einstein formulated the Theory of Relativity in 1905.

7. www.britannica.com › dictionary › theoryTheory Definition & Meaning | Britannica Dictionary

   www.britannica.com › dictionary › theory

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   THEORY meaning: 1 : an idea or set of ideas that is intended to explain facts or events; 2 : an idea that is suggested or presented as possibly true but that is not known or proven to be true.

8. www.oxfordlearnersdictionaries.com › definitiontheory noun - Definition, pictures, pronunciation and usage ...

   www.oxfordlearnersdictionaries.com › definition

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   /ˈθiːəri/, /ˈθɪri/ (plural theories) Idioms. [countable, uncountable] a formal set of ideas that is intended to explain why something happens or exists. theory of something the theory of evolution/relativity. scientific/economic theory. The theories were tested on a sample of the population.