Definitions of chamber:

• noun:   a natural or artificial enclosed space
• noun:   a room where a judge transacts business
• noun:   an enclosed volume (as the aqueous chamber of the eyeball or the chambers of the heart)
• noun:   a deliberative or legislative or administrative or judicial assembly

  Example: "The upper chamber is the senate"

• noun:   a room used primarily for sleeping
• verb:   place in a chamber
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #14956)