cage

(noun) an enclosure made or wire or metal bars in which birds or animals can be kept. Synonyms: coop.

(noun) something that restricts freedom as a cage restricts movement.

(noun) United States composer of avant-garde music (1912-1992). Synonyms: Cage, John Cage, John Milton Cage Jr..

(noun) the net that is the goal in ice hockey.

(noun) a movable screen placed behind home base to catch balls during batting practice. Synonyms: batting cage.

(verb) confine in a cage. Synonyms: cage in. Examples: "The animal was caged."