Definition of "chamber"

A room or set of rooms, particularly:

1. The private room of an individual, especially of someone wealthy or noble.  quotations  examples

   Quotations

   • Once upon a midnight dreary, while I pondered, weak and weary, / Over many a quaint and curious volume of forgotten lore, / While I nodded, nearly napping, suddenly there came a tapping, / As of some one gently rapping, rapping at my chamber door.

     1845 February, — Quarles [pseudonym; Edgar Allan Poe], “The Raven”, in The American Review‎, volume I, number II, New York, N.Y., London: Wiley & Putnam, […], page 143

2. A bedroom.  examples

3. The private office of a judge.  examples

4. The room used for deliberation by a legislature.  examples

5. (UK) A single law office in a building housing several.  examples

6. (dated, usually in the plural) Rooms in a lodging house.  quotations  examples

   Quotations

   • A committee of marriageable ladies, or of any Christian persons interested in the propagation of the domestic virtues, should employ a Cruikshank or a Leech, or some other kindly expositor of the follies of the day, to make a series of designs representing the horrors of a bachelor's life in chambers, and leading the beholder to think of better things, and a more wholesome condition.

     1848 November – 1850 December, William Makepeace Thackeray, “Which Had Very Nearly Been the Last of the Story”, in The History of Pendennis. […], volume II, London: Bradbury and Evans, […], published 1850, page 120

(obsolete) Ellipsis of chamber pot: a container used for urination and defecation in one's chambers.  quotations

(figuratively) The legislature or division of the legislature itself.  examples

Any enclosed space occupying or similar to a room.  examples

(biology) An enlarged space in an underground tunnel of a burrowing animal.

(firearms) The area holding the ammunition round at the initiation of its discharge.  examples

(firearms) One of the bullet-holding compartments in the cylinder of a revolver.  examples

(historical) A short piece of ordnance or cannon which stood on its breech without any carriage, formerly used chiefly for celebrations and theatrical cannonades.

One of the two atria or two ventricles of the heart.  examples

To enclose in a room.  examples

To reside in or occupy a chamber or chambers.  quotations  examples

To place in a chamber, as a round of ammunition.  examples

To create or modify a gun to be a specific caliber.  examples

(martial arts) To prepare an offensive, defensive, or counteroffensive action by drawing a limb or weapon to a position where it may be charged with kinetic energy.  examples

(obsolete) To be lascivious.