Noun
1. a piece of land cleared of trees and usually enclosed;
"he planted a field of wheat"2. a region where a battle is being (or has been) fought;
"they made a tour of Civil War battlefields"3. somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected;
"anthropologists do much of their work in the field"4. a branch of knowledge;
"in what discipline is his doctorate?""teachers should be well trained in their subject""anthropology is the study of human beings"5. the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
6. a particular kind of commercial enterprise;
"they are outstanding in their field"7. a particular environment or walk of life;
"his social sphere is limited""it was a closed area of employment""he's out of my orbit"8. a piece of land prepared for playing a game;
"the home crowd cheered when Princeton took the field"9. extensive tract of level open land;
"they emerged from the woods onto a vast open plain""he longed for the fields of his youth"10. (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;
"the set of all rational numbers is a field"11. a region in which active military operations are in progress;
"the army was in the field awaiting action""he served in the Vietnam theater for three years"12. all of the horses in a particular horse race
13. all the competitors in a particular contest or sporting event
14. a geographic region (land or sea) under which something valuable is found;
"the diamond fields of South Africa"15. (computer science) a set of one or more adjacent characters comprising a unit of information
16. the area that is visible (as through an optical instrument)
17. a place where planes take off and land