- 1 (of a seat, hotel room, house, etc.) empty; not being used synonym unoccupied vacant properties The seat next to him was vacant. a vacant lot (= a piece of land in a city that is not being used) There is a vacant room, actually. compare engaged, occupied
- 2 (formal) if a job in a company is vacant, no one is doing it and it is available for someone to take When the post finally fell (= became) vacant, they offered it to Natasha. The position left vacant in July has not yet been filled.
- 3(of a look, an expression, etc.) showing no sign that the person is thinking of anything a vacant look She had large, vacant brown eyes.
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adverb to stare vacantly