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
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 piece of land cleared of trees and usually enclosed
a region where a battle is being (or has been) fought
somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected
a branch of knowledge
the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
a piece of land prepared for playing a game
a particular kind of commercial enterprise
