The (volume of) air that is inhaled and exhaled with each resting breath

plural of air freshener

(Australia, informal) Any of the correspondence schools catering for the primary and early secondary education of children in remote and outback Australia.

(computer security, of a system) Physically isolated from the Internet or some other unsecured network.

Synonym of windsock

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