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

Overrun, taken over; -- of countries or territories; as, occupied France. Opposite of unoccupied.

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

having ones attention or mind or energy engaged; "she keeps herself fully occupied with volunteer activities"; "deeply engaged in conversation"

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

resided in; having tenants; "not all the occupied (or tenanted) apartments were well kept up"

property that is being inhabited and properly maintained (i.e., evidence of mail, utilities, grass cuts).