noun

• A room or set of rooms, particularly:
  "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."
• A room or set of rooms, particularly:
• A room or set of rooms, particularly:
• A room or set of rooms, particularly:

verb

• (transitive) To enclose in a room.
  "She had chambered herself in her room, and wouldn't come out."
• (transitive) 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."
• (transitive) 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."
• (martial arts, transitive) 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.
  "Bob chambered his fist for a blow, but Sheila struck first."