in_use
1. [ adjective ] (of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line)
Synonyms: engaged busy
Examples:

"her line is busy" "the lavatory is in use" "kept getting a busy signal"

Related terms: occupied
2. [ adjective ] currently being used
Examples:

"robots are in use throughout industry"

Related terms: used
Similar spelling:   ins
  Inks
  Ines
  inge
  Inez
  Ince
  Innis
  Innes