"airhead : (military) An area of hostile territory that has been seized for use as an airbase to..."

“airhead : (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.
(by extension) A (usually temporary) landing area for aircraft for supplying a non-military operation.
(mining, archaic) Alternative form of air-head (“a horizontal channel providing ventilation in a mine.”)
To celebrate April Fools’ Day, we are featuring a series of homonyms of more common words – enjoy!”

- https://en.wiktionary.org/wiki/airhead#English

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