Antonyms of adj unauthorised

2 senses of unauthorised

Sense 1
unauthorized (vs. authorized), unauthorised -- (not endowed with authority)


Sense 2
unauthorized, unauthorised, wildcat -- (without official authorization; "an unauthorized strike"; "wildcat work stoppage")

INDIRECT (VIA unofficial) -> official -- (having official authority or sanction; "official permission"; "an official representative")

Similarity of adj unauthorised

2 senses of unauthorised

Sense 1
unauthorized (vs. authorized), unauthorised -- (not endowed with authority)
       => self-appointed -- (designated or chosen by yourself; "a self-appointed guardian of public morals")
       => unaccredited, unlicensed, unlicenced -- (lacking official approval)
          Also See-> illegitimate#2; unofficial#1

Sense 2
unauthorized, unauthorised, wildcat -- (without official authorization; "an unauthorized strike"; "wildcat work stoppage")
       => unofficial (vs. official) -- (not having official authority or sanction; "a sort of unofficial mayor"; "an unofficial estimate"; "he participated in an unofficial capacity")