airhead

1. (military) An area of hostile territory that has been seized for use as an airbase to ensure the further safe landing of troops and materiel.Examples: "The only difference between an airhead and a beachhead is that an airhead covers 360 degrees whereas a beachhead usually covers 180 degrees. An airhead is two beachheads back to back with the reinforcements and resupply coming by air instead of by sea. [...] [T]o handle their mountainous proportions there must be in the airhead a sufficient number of trained and equipped airhead service troops."; "In another war airheads will be more important than beachheads. Neither one will work unless we can keep it adequately supplied. The successful combat air force will require a huge transport fleet for air lift."; "The initial airhead may in fact be a series of smaller airheads which, after landing, join up in combat structure as mutually supporting in a tactical sense."

2. (by extension) A (usually temporary) landing area for aircraft for supplying a non-military operation.broadly

3. (mining, archaic) Alternative form of air-head (“a horizontal channel providing ventilation in a mine.”).Examples: "[T]he mine then becomes exposed to the most fearful results, where the workings have been opened, by the Air being driven backwards along the Airhead into the reservoirs of Gas formed in the upper cavities of the workings, and issuing into the Gate-road charged with the Gas to the firing point, causing an explosion, of which many familiar instances might be adduced."alt-ofalternativearchaic