ETYM Old Eng. feld, fild, AS. feld; akin to Dutch veld, German feld, Swed. fält, Dan. felt, Icel. fold field of grass, AS. folde earth, land, ground, OS. folda.
1. A geographic region (land or sea) under which something valuable is found.
2. Somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected.
3. The area that is visible through an optical instrument; SYN. field of view.
4. The space around a body within which it can exert force on another similar body not in contact with it; SYN. field of force, force field.
5. A particular kind of commercial enterprise; SYN. field of operation, line of business.
6. All the competitors in a particular contest or sporting event.
7. (Horse racing) All of the horses in a particular race.
A region in which military operations are in progress.