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"
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"
capable of being reached; "a town accessible by rail"
easy to get along with or talk to; friendly; "an accessible and genial man"
easily obtained; "most students now have computers accessible"; "accessible money"
capable of being read with comprehension; "readily accessible to the nonprofessional reader"; "the tales seem more approachable than his more difficult novels"