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 theory theory /ˈθiːɝi/

noun

  1. () 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  ( theory )
    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
    theories can incorporate facts and laws and tested hypotheses
     True in fact and theory
    true in fact and theory
  2. () A tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena  ( hypothesis , possibility , 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
     A scientific hypothesis that survives experimental testing becomes a scientific 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
    he proposed a fresh theory of alkalis that later was accepted in chemical practices
  3. () A belief that can guide behavior  ( theory )
    a belief that can guide behavior
     The architect has a theory that more is less
    the architect has a theory that more is less
     They killed him on the theory that dead men tell no tales
    they killed him on the theory that dead men tell no tales