theory
thi ree
- 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 - n 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
he proposed a fresh theory of alkalis that later was accepted in chemical practices - 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
- Retiree Ed Lake has become obsessed with the anthrax case--and he has a theory about who did it.
- Because Darwin's theory is a theory, it is still being tested as new evidence is discovered.
- PTI's Michael Lemonick assesses the theory of evolution after Intelligent Design is defeated in Pennsylvania.