closet

(noun) a small room (or recess) or cabinet used for storage space. Synonyms: cupboard.

(noun) a toilet in Britain. Synonyms: water closet, W.C., loo.

(noun) a tall piece of furniture that provides storage space for clothes; has a door and rails or hooks for hanging clothes. Synonyms: wardrobe, press.

(noun) a small private room for study or prayer.

(verb) confine to a small space, as for intensive work.