AIRHEAD

PRONUNCIATION: (AIR-hed)

MEANING: noun:
1. An area in a hostile territory, secured for bringing in supplies and personnel by air.
2. A silly or unintelligent person.
3. A horizontal channel created to provide ventilation in a mine.

ETYMOLOGY: For 1: From air + beachhead. Earliest documented use: 1943. Also see bridgehead.
For 2: From the metaphorical notion that a person’s head contains only air. Earliest documented use: 1971.
For 3: From air + head (source of a channel). Earliest documented use: 1817.
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AIRHERD - a flock of domesticated eagles

AIR HEAD - the bathroom in a jetliner

FAIR HEAD - a Middle Ages blonde, for whom Knights of Old went on Quests (both meanings of for)