The children played in the 'vacant lot' [=a piece of land that is not being used] between the two buildings.
There were no 'vacant' apartments in the building. [=there were no empty apartments available to be rented]
('Brit') I found my job through the 'situations vacant' [=('US') 'help wanted'] section of the newspaper.
(..) ...cast vicariously as both victim and villain by the vicissitudes of fate. This visage, no mere veneer of vanity... ...is a vestige of the vox populi, now vacant, vanished. However, this valorous visitation of a bygone vexation stands vivified... ...and has vowed to vanquish these venal (..)2005 V for Vendetta