IPA: /ˈveɪ.kənt/
KK: /ˈveɪkənt/
Empty or not occupied; having no contents or activities.
The house has been vacant for several months.
Vacant → It is formed from "vacare" (meaning to be empty or free) and the suffix "-ant" (indicating an ongoing state). The word "vacant" means being in a state of emptiness or not occupied.
Think of a space that is 'empty' ('vacare') — that's why we say it is vacant.