a part or space marked or partitioned off.

a separate room, section, etc.

a baggage compartment.

U.S. Railroads . a private bedroom with toilet facilities.

a separate aspect, function, or the like

the compartments of the human mind.

Architecture . a distinct major division of a design.

Heraldry . a decorative base, as a grassy mound, on which the supporters of an escutcheon stand or rest.

to divide into compartments.

noun

alcove , area , bay , berth , booth , carrel , carriage , category , cell , chamber , corner , cubbyhole , cubicle , department , division , hole , locker , niche , nook , part , piece , pigeonhole , place , portion , slot , stall , bin , bunker , hold , section