airhead

Short definition from Wiktionary

Noun

1. 1
   An area of hostile territory that has been seized for use as an airbase to ensure the further safe landing of troops and materiel.
2. 2
   A (usually temporary) landing area for aircraft for supplying a non-military operation.
3. 3
   Alternative form of air-head (“a horizontal channel providing ventilation in a mine.”).
4. 4
   A foolish, silly, or unintelligent person.