Chamber

A room or set of rooms, particularly:

A chamberpot.

The legislature or division of the legislature itself.

"The resolution, which speedily passed the Senate, was unable to gain a majority in the lower chamber."

Any enclosed space occupying or similar to a room.

"A canal lock chamber; a furnace chamber; a test chamber"

To enclose in a room.

"She had chambered herself in her room, and wouldn't come out."

To reside in or occupy a chamber or chambers.

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

"The hunter fired at the geese and missed, then shrugged his shoulders and chambered another cartridge."

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

"The rifle was originally chambered for 9mm, but had since been modified for a larger, wildcat caliber."

A container used for urination and defecation, particularly those used in early modern towns before the advent of the flush toilet.