a piece of land cleared of trees and usually enclosed
somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected
a region where a battle is being (or has been) fought
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
extensive tract of level open land
a particular kind of commercial enterprise
a piece of land prepared for playing a game
a particular environment or walk of life
(mathematics) a set of elements such that addition and multiplication are commutative and associative and multiplication is distributive over addition and there are two elements 0 and 1
