theory

  

Definition

A set of assumptions, propositions, or accepted facts that attempts to provide a plausible or rational explanation of cause-and-effect (causal) relationships among a group of observed phenomenon. The word's origin (from the Greek thorós, a spectator), stresses the fact that all theories are mental models of the perceived reality.

Use theory in a sentence

  • One of the most well-known theories is the Big Bang Theory, which is one plausible explanation of how the universe was formed.

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