Antonyms of adj in_use

2 senses of in use

Sense 1
busy, engaged, in use (predicate) -- ((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")

INDIRECT (VIA occupied) -> unoccupied -- (not held or filled or in use; "an unoccupied telephone booth"; "unoccupied hours")

Sense 2
in use -- (currently being used; "robots are in use throughout industry")

INDIRECT (VIA used) -> misused -- (used incorrectly or carelessly or for an improper purpose; "misused words are often laughable but one weeps for misused talents")

Similarity of adj in_use

2 senses of in use

Sense 1
busy, engaged, in use (predicate) -- ((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")
       => occupied (vs. unoccupied) -- (held or filled or in use; "she keeps her time well occupied"; "the wc is occupied")

Sense 2
in use -- (currently being used; "robots are in use throughout industry")
       => used (vs. misused) -- (employed in accomplishing something; "the principle of surprise is the most used and misused of all the principles of war"- H.H.Arnold & I.C.Eaker)