Meaning of air chamber

air' cham"ber

Pronunciation: [key]
  1. a chamber containing air, as in a pump, lifeboat, or organic body.
  2. Also calleda compartment of a hydraulic system containing air that by its elasticity equalizes the pressure and flow of liquid within the system.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.