Like an occupied lavatory (2-3)
I believe the answer is:
in-use
(Other definitions for in-use that I've seen before include "Occupied" , "Engaged" , "In employment or practice" , "Being employed -- unavailable" , "Currently employed" .)
I believe the answer is:
in-use
(Other definitions for in-use that I've seen before include "Occupied" , "Engaged" , "In employment or practice" , "Being employed -- unavailable" , "Currently employed" .)