in use

Definitions of in use
  1. adjective
    currently being used
    “robots are in use throughout industry”
    Synonyms:
    used
    employed in accomplishing something
  2. 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)
    “the lavatory is in use
    synonyms: busy, engaged
    occupied
    held or filled or in use
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