the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it(noun.phenomenon)
(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(noun.group)
Example: The set of all rational numbers is a field.
source: wordnet30
a region in which active military operations are in progress(noun.location)
Example: The army was in the field awaiting action.