theories

theory[ 'θiəriz ]

• n.
  • 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 theory about 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"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"

    同义词：hypothesispossibility

  • 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"