theory meaning

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theory noun
1. (explanation) 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
  • "theories can incorporate facts and laws and tested hypotheses"
  • "true in fact and theory"
2. (belief) 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"
hypothesis noun
1. (concept) a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
Related: possibility, theory
  • "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"
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