energy that is radiated or transmitted in the form of rays or waves or particles
the act of spreading outward from a central source
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
