vacancy vacancy /ˈveɪkənsi/

noun

1. () Being unoccupied  ( vacancy )
   being unoccupied
     The "No Vacancy" sign hung outside the fully booked hotel.
   The "No Vacancy" sign hung outside the fully booked hotel.
   
2. () An empty area or space  ( emptiness , vacuum , void , vacancy )
   an empty area or space
    The huge desert voids
   the huge desert voids
    The emptiness of outer space
   the emptiness of outer space
    Without their support he'll be ruling in a vacuum
   without their support he'll be ruling in a vacuum