Theory - definition, pronunciation, transcription

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Amer.  |ˈθiːərɪ|  American pronunciation of the word theory
Brit.  |ˈθɪərɪ|  British pronunciation of the word theory

noun

- a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena
true in fact and theory
- a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena (syn: hypothesis, possibility)
a scientific hypothesis that survives experimental testing becomes a scientific theory
he proposed a fresh theory of alkalis that later was accepted in chemical practices
- a belief that can guide behavior
the architect has a theory that more is less
they killed him on the theory that dead men tell no tales

Extra examples

A widely accepted scientific theory

Her method is based on the theory that all children want to learn.

There are a number of different theories about the cause of the disease.

She proposed a theory of her own.

Investigators rejected the theory that the death was accidental.

There is no evidence to support such a theory.

He is a specialist in film theory and criticism.

In theory their plan makes sense.

They proceeded on the theory that the supplies would arrive on time.

She has a theory that drinking milk prevents colds.

Darwin's theory of evolution

Freudian theory has had a great influence on psychology.

I'm taking a course on political theory.

Detectives are working on a theory that he knew his murderer.

They showed the theory to be faulty.

Word forms

noun
singular: theory
plural: theories
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