chamber

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A room in a house, especially a bedroom.
• noun A room where a person of authority, rank, or importance receives visitors.
• noun The private office where the judge consults with parties and conducts business not required to be brought in open court.
• noun Chiefly British A suite of rooms, especially one used by lawyers.
• noun A hall for the meetings of a legislative or other assembly.
• noun A legislative or judicial body.
• noun A board or council.
• noun A place where municipal or state funds are received and held; a treasury.
• noun An enclosed space or compartment.
• noun An enclosed space in the body of an organism; a cavity.
• noun A compartment in a firearm, as in the breech of a rifle or the cylinder of a revolver, that holds the cartridge in readiness for firing.
• noun An enclosed space in the bore of a gun that holds the charge.
• transitive verb To put (a round) in the chamber of a firearm.
• transitive verb To design or manufacture (a firearm) to hold a specific type of cartridge.
• transitive verb To furnish with a chamber or chambers.

from The Century Dictionary.

• noun The place where the moneys due the government (municipal or other) are received and kept; the treasury; the chamberlain's office. See chamberlain, 2.
• noun of the British and American Divines who in 1870 and following year's produced the present Revised Version of the Bible; and
• noun of the Upper House of Convocation of the Province of Canterbury: so named from its tapestried walls which show many scenes from Jerusalem. Here Henry IV. died.
• To reside in or occupy a chamber.
• To fit snugly, as layers of buckshot in the barrel of a gun or in a cartridge. See extract under II., 3.
• To shut up in or as in a chamber.
• To furnish with a chamber, as the barrel of a breech-loading firearm.
• To fit into tho barrel of a gun or into a cartridge, as buckshot.
• noun A room of a dwelling-house; an apartment; specifically, a sleeping-apartment; a bedroom.
• noun plural
• noun A room or rooms where professional men, as lawyers, conduct their business; especially, any place out of court (usually a room set apart for this purpose) where a judge may dispose of questions of procedure of a class not sufficiently important to be heard and argued in court, or too urgent to await a term of court: distinctively called judges' chambers.
• noun Furnished rooms hired for residence in the house of another; lodgings: as, “a bachelor life in chambers,”
• noun A place where an assembly meets: as, a legislative chamber, ecclesiastical chamber, privy chamber, etc.— 4. The assembly itself; sometimes, specifically, one of the branches of a legislative assembly: as, the New York Chamber of Commerce; a meeting of the legislative chamber.
• noun A compartment or inclosed space; a hollow or cavity: as, the chambers of the eye (see below); the chamber of a furnace.
• noun Specifically— In hydraulic engin,:
• noun The space between the gates of a canal-lock.
• noun The part of a pump in which the bucket of a plunger works.
• noun Milit.:
• noun That part of a barrel, at the breech of a firearm or piece of ordnance, which is enlarged to receive the charge or cartridge; also, a receptacle for a cartridge in the cylinder of a revolver or of a breech-loading gun.
• noun An underground cavity or mine for holding powder and bombs, where they may be safe and dry. Distinctively called powder-chamber and bomb-chamber.
• noun The indentation in an axle-box, designed to hold the lubricant.
• noun That part of a mold containing the exterior part of a casting and covering the core in hollow castings.
• noun In anatomy: A cavity representing the urogenital sinus of the embryo undifferentiated into a prostatic and bulbous urethra.
• noun See chambers of the eye, below.
• noun In conchology:
• noun The interval between the septa of the camerated shell of a cephalopod, such as species of Nautilus or Ammonites, as well as the portion of the shell in which the animal rests.
• noun A cavity separated from another or the main part of the interior of the shell by a septum.
• noun In coal-mining, same as breast or room. See breast.
• noun A short piece of ordnance without a carriage and standing on its breech, formerly used chiefly for rejoicings and theatrical purposes.
• noun A bedroom utensil, used for containing urine; a chamber-pot.
• noun A court in the Netherlands where cases relating to insurance are tried.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To reside in or occupy a chamber or chambers.
• intransitive verb obsolete To be lascivious.