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a. : a belief, policy, or procedure proposed or followed as the basis of action. her method is based on the theory that all children want to learn. b. : an ideal or hypothetical set of facts, principles, or circumstances often used in the phrase in theory. in theory, we have always advocated freedom for all. 3. a.
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.
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.
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.
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.
Einstein's theory of relativity. Synonyms: doctrine , law , principle a proposed explanation whose status is still conjectural and subject to experimentation, in contrast to well-established propositions that are regarded as reporting matters of actual fact.
Definition of theory noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.