A compartment is a space within another space, like the glove compartment in a car.

Compartments are spaces, but they're not spaces that stand on their own. Rather, compartments are part of other spaces: they're subdivisions. The trunk is a compartment of a car. A pocket is a compartment of a suitcase. Closets are like compartments of rooms. One of the most common compartments is a car's glove compartment, where people throw all kinds of things. Anything that is divided into smaller spaces has compartments. The ventricles are like compartments of your heart.

Definitions of compartment
  1. noun
    a partitioned section, chamber, or separate room within a larger enclosed area
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    a compartment in an aircraft used for some specific purpose
    a compartment on a ship between decks; often used as a hospital
    separate partitioned area in a public place for a few people
    box, loge
    private area in a theater or grandstand where a small group can watch the performance
    a compartment at the front of a motor vehicle or locomotive where driver sits
    the enclosed compartment of an aircraft or spacecraft where passengers are carried
    small room on a ship or boat where people sleep
    cabinet, locker, storage locker
    a storage compartment for clothes and valuables; usually it has a lock
    cable car, car
    a conveyance for passengers or freight on a cable railway
    car, elevator car
    where passengers ride up and down
    car, gondola
    the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant
    compartment where the pilot sits while flying the aircraft
    a compartment on a European passenger train; contains 4 to 6 berths for sleeping
    drawing room
    a private compartment on a sleeping car with three bunks and a toilet
    glove compartment
    compartment on the dashboard of a car
    automobile trunk, luggage compartment, trunk
    compartment in an automobile that carries luggage or shopping or tools
    detachable compartment of a spacecraft
    pilothouse, wheelhouse
    an enclosed compartment from which a vessel can be navigated
    a small private compartment for one on a sleeping car
    a compartment in a stable where a single animal is confined and fed
    an enclosed compartment in a ship or plane for holding something as e.g. fish or a plane's landing gear or for protecting something as e.g. a ship's pumps
    bilge well
    (nautical) a well where seepage drains to be pumped away
    British term for the luggage compartment in a car
    command module
    a space module in which astronauts can live and control the spacecraft and communicate with earth
    conning tower
    an armored pilothouse on a warship
    glory hole, lazaretto
    a small locker at the stern of a boat or between decks of a ship
    jury box
    an enclosure within a courtroom for the jury
    press box
    box reserved for reporters (as at a sports event)
    pressure cabin
    cabin consisting of the pressurized section of an aircraft or spacecraft
    pump well
    an enclosure in the middle of a ship's hold that protects the ship's pumps
    an elevated box for viewing events at a sports stadium
    a guest cabin
    witness box, witness stand
    a box enclosure for a witness when testifying
    type of:
    an area within a building enclosed by walls and floor and ceiling
  2. noun
    a space into which an area is subdivided
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    any small compartment
    cubbyhole, pigeonhole
    a small compartment
    PO Box, POB, Post-Office box, call box, letter box
    a numbered compartment in a post office where mail is put to be called for
    type of:
    an empty area (usually bounded in some way between things)
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