Definition for In use:

• ( 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); " her line is busy"; " receptionists' telephones are always engaged"; " the lavatory is in use"; " kept getting a busy signal"

Synonyms for In use:

• adj.

  •engaged (adjective)
  • occupied,
  • employed,
  • unavailable.

• Other synonyms:

  •Other relevant words:
  • in operation,
  • utilized,
  • taken,
  • in service,
  • in commission,
  • in practice,
  • used,
  • being employed,
  • in force.

Antonyms for In use:

• adj.

  • current
    past, uncommon, old-fashioned, antiquated, old, uncontemporary.
  • engaged
    available, Disengaged, bored, inactive, idle, uninvolved, inoperable, unoccupied, not working, disinterested, uninterested.
  • living
    asleep, apathetic, dead, sluggish, lethargic.
  • popular
    limited, different, particular, unknown, unpopular, unusual, disliked.
  • prevalent
    infrequent, rare, subservient, abnormal, irregular, peculiar, inferior, scarce, exceptional, isolated.
  • Other antonyms:
    misused.