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Dictionary definition for: Theory

1. (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; "theories can incorporate facts and laws and tested hypothes

2. (n) 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

3. (n) 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"

WordNet 2.1 Copyright Princeton University. All rights reserved.