vacancy

noun6

1. •
   An unoccupied position or job.

   • Whenever there is a vacancy in the office of the Vice President, the President shall nominate a Vice President who shall take office upon confirmation by a majority vote of both Houses of Congress. — 1965
2. •
   An available room in a hotel; guest house, etc.
3. •
   A defect in a crystal caused by the absence of an atom in a lattice
4. •
   Empty space.

   • Sky was set above earth, land ringed with sea, / Chaos retired to its own vacancy …. — 1993
5. •
   A blank mind, unoccupied with thought.
6. •
   Lack of intelligence or understanding.