adj. 25B6; adjective
a vacant house : EMPTY, unoccupied, available, not in use, free, unfilled; uninhabited, untenanted.
a vacant look : BLANK, expressionless, unresponsive, emotionless, impassive, uninterested, vacuous, empty, glazed, glassy; unintelligent, dull-witted, dense, brainless, empty-headed.
full, occupied, expressive.