occupied

Engaged; in use; being used by a person and not free for use by someone else. Opposite of free, available, and unoccupied.

Inhabited, lived-in, tenanted; having residents; — of dwelling units.

Overrun, taken over; — of countries or territories. Opposite of unoccupied.

Busy; actively or fully engaged in some activity; — of people. Opposite of idle.

reserved, engaged

busy, unavailable

subjugated, under the control of a foreign military presence

Simple past tense and past participle of occupy.

seized and controlled as by military invasion

resided in; having tenants