vacancy

Short definition from Wiktionary

Noun

1. 1
   An unoccupied position or job.
2. 2
   An available room in a hotel; guest house, etc.
3. 3
   Empty space.
4. 4
   A blank mind, unoccupied with thought.
5. 5
   Lack of intelligence or understanding.
6. 6
   A defect in a crystal caused by the absence of an atom in a lattice