occupied
adjective
ˈɒkjupaɪd 
ˈɑːkjupaɪd 
1 [not before noun] being used by somebodyOnly half of the rooms are occupied at the moment. see also owner-occupied2 [not before noun] busyoccupied (doing something/in doing something/in something) He's fully occupied looking after three small children.occupied (with something/with doing something) Only half her time is occupied with politics.The most important thing is to keep yourself occupied.3 (of a country, etc.) controlled by people from another country, etc, using military forceHe spent his childhood in occupied Europe.Opposite
unoccupied