FIELD

A piece of land cleared of trees and usually enclosed

Example: "He planted a field of wheat"

A region where a battle is being (or has been) fought

Example: "They made a tour of civil war battlefields"

Somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected

Example: "Anthropologists do much of their work in the field"

A branch of knowledge

Example: "In what discipline is his doctorate?"

The space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it

A particular kind of commercial enterprise

Example: "They are outstanding in their field"

A particular environment or walk of life

Example: "His social sphere is limited"

A piece of land prepared for playing a game

Example: "The home crowd cheered when princeton took the field"

Extensive tract of level open land

Example: "They emerged from the woods onto a vast open plain"

(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

Example: "The set of all rational numbers is a field"

A region in which active military operations are in progress

Example: "The army was in the field awaiting action"

All of the horses in a particular horse race

All the competitors in a particular contest or sporting event

A geographic region (land or sea) under which something valuable is found

Example: "The diamond fields of south africa"

(computer science) a set of one or more adjacent characters comprising a unit of information

The area that is visible (as through an optical instrument)

A place where planes take off and land