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Definitions for Theory

[1] 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: Einstein's theory of relativity.
[2] 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.
[3] Mathematics . a body of principles, theorems, or the like, belonging to one subject: number theory.
[4] the branch of a science or art that deals with its principles or methods, as distinguished from its practice: music theory.
[5] a particular conception or view of something to be done or of the method of doing it; a system of rules or principles: conflicting theories of how children best learn to read.
[6] contemplation or speculation: the theory that there is life on other planets.
[7] guess or conjecture: My theory is that he never stops to think words have consequences.
[8] in theory , ideally; hypothetically: In theory, mapping the human genome may lead to thousands of cures.
[9] a system of rules, procedures, and assumptions used to produce a result
[10] abstract knowledge or reasoning
[11] a speculative or conjectural view or idea I have a theory about that
[12] an ideal or hypothetical situation (esp in the phrase in theory )
[13] a set of hypotheses related by logical or mathematical arguments to explain and predict a wide variety of connected phenomena in general terms the theory of relativity
[14] a nontechnical name for hypothesis (def. 1)

Words related to Theory

code, doctrine, argument, concept, thesis, system, assumption, suspicion, proposal, scheme, approach, method, premise, philosophy, idea, plan, rationale, understanding, provision, ideology

Words nearby Theory

theoretical arithmetic, theoretician, theoretics, theorist, theorize, theory, theory of equations, theory of everything, theory of games, theory of mind, theory of numbers

Origin of Theory

1590–1600; < Late Latin theōria < Greek theōría a viewing, contemplating, equivalent to theōr(eîn ) to view + -ia -y3

Words that may be confused with Theory

hypothesis, law, theory, (see, synonym, study, at, the, current, entry)

Word origin for Theory

C16: from Late Latin theōria, from Greek: a sight, from theōrein to gaze upon

Synonyms for Theory

approach, argument, assumption, code, concept, doctrine, idea, ideology, method, philosophy, plan, position, premise, proposal, provision, rationale, scheme, speculation, suspicion, system, thesis, understanding, base, basis, codification, conditions, conjecture, dogma, feeling, foundation, grounds, guess, guesswork, hunch, impression, outlook, postulate, presentiment, presumption, shot, stab, supposal, supposition, surmise, theorem, formularization, suppose, systemization