Pronunciation: (kē'pur),[key] —n. 1. a person who guards or watches, as at a prison or gate.
2. a person who assumes responsibility for another's behavior: He refused to be his brother's keeper. 3. a person who owns or operates a business (usually used in combination): a hotelkeeper. 4. a person who is responsible for the maintenance of something (often used in combination): a zookeeper; a groundskeeper. 5. a person charged with responsibility for the preservation and conservation of something valuable, as a curator or game warden.
6. a person who conforms to or abides by a requirement: a keeper of his word. 7. a fish that is of sufficient size to be caught and retained without violating the law.
8. Football.a play in which the quarterback retains the ball and runs with it, usually after faking a hand-off or pass.
9. something that serves to hold in place, retain, etc., as on a door lock.
10. something that lasts well, as a fruit.
11. See guard ring. 12. an iron or steel bar placed across the poles of a permanent horseshoe magnet for preserving the strength of the magnet during storage.