n An enclosed space. For example, a test chamber is typically a closable case where devices under test are placed.
n In a firearm, this is the portion of the weapon that holds the ammunition round immediately prior to (and during initiation of) its discharge.
n One of the legislative bodies in a government where multiple such bodies exist, or a single such body in comparison to others.
v In 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.