Noun

1. United states comedian and film actor (1880-1946)
2. A piece of land cleared of trees and usually enclosed
3. A region where a battle is being (or has been) fought
4. Somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected
5. A branch of knowledge
6. The space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
7. A particular kind of commercial enterprise
8. A particular environment or walk of life
9. A piece of land prepared for playing a game
10. Extensive tract of level open land
11. (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
12. A region in which active military operations are in progress
13. All of the horses in a particular horse race
14. All the competitors in a particular contest or sporting event
15. A geographic region (land or sea) under which something valuable is found
16. (computer science) a set of one or more adjacent characters comprising a unit of information
17. The area that is visible (as through an optical instrument)
18. A place where planes take off and land

Verb

1. Catch or pick up (balls) in baseball or cricket
2. Play as a fielder
3. Answer adequately or successfully
4. Select (a team or individual player) for a game