not endowed with authority[ant: authorised ]

without official authorization; "an unauthorized strike"; "wildcat work stoppage"

adjective

allowable , authorized , official , permitted

adjective

crooked * , dirty * , illegal , illegitimate , no-no , off base * , out of bounds , out of line , over the line , pirated , shady * , unapproved , unconstitutional , under the table , unjustified , unlawful , unofficial , unsanctioned , unwarranted , wildcat * , wrongful , apocryphal , banned , contraband , counterfeit , illicit , outlawed , prohibited , proscriptive , spurious , tabu , unallowed , unauthoritative , unorthodox , unpermitted