without official authorization; "an unauthorized strike"; "wildcat work stoppage"
{s} without authorization, not authorized, unlicensed, forbidden, unlawful (also unauthorised)
un·author·ized in BRIT, also use unauthorised If something is unauthorized, it has been produced or is happening without official permission. the unauthorized use of a military vehicle It has also been made quite clear that the trip was unauthorised. = unofficial. without official approval or permission