A protective system in automobiles for which when an accident does occur, a bag containing nitrogen, created by the volatile decomposition of salt azide, quickly inflates as you're watching driver or passenger, preventing problems for your head. Part environment bags, like the back-seat passengers, additionally prevent damage.
somebody who talks excessively; a windbag or gossip.
A protective system in vehicles which when an accident takes place, a bag containing nitrogen, formed because of the explosive decomposition of sodium azide, quickly inflates in front of the driver or passenger, preventing injury to the head. Part air bags, including the back seat guests, also avoid damage.