A person holding a rank, in the Royal Air Force and many Commonwealth air forces, between that of group captain and air vice-marshal, equivalent to an army brigadier general, or equivalent rank in other air forces.

plural of air commodore

Alternative form of airtight

(informal, military) Air cavalry

(obsolete) oxygen gas

(biology) The air that can be drawn into the lungs in addition to the tidal air, by the deepest possible inhalation.

(biology) The air which under ordinary circumstances does not leave the lungs during respiration.

A kind of gas made by forcing air through a volatile hydrocarbon, such as the lighter petroleums. The air is so saturated with combustible vapour as to be a convenient illuminating and heating agent.

To go out walking or riding, so as to enjoy the fresh air.

A device for producing a jet of water by the force of compressed air.