to enclose within bounds; limit or restrict

She confined her remarks to errors in the report. Confine your efforts to finishing the book.

to shut or keep in; prevent from leaving a place because of imprisonment, illness, discipline, etc.

For that offense he was confined to quarters for 30 days.

Usually, confines. a boundary or bound; limit; border; frontier.

Often, confines. region; territory.

Archaic . confinement.

Obsolete . a place of confinement; prison.

noun

enclosing , restraining , bounding , detaining , imprisoning

adjective

close , cramped , crowded , narrow , snug