Main entry: authorised, authorized
Definition: endowed with authority
Antonyms: unauthorised, unauthorized
Definition: not endowed with authority
Antonyms: noncommissioned
Definition: (of military officers) appointed from enlisted personnel
Main entry: authorised, authoritative, authorized
Definition: sanctioned by established authority
Usage: an authoritative communique; the authorized biography
Antonyms: unofficial
Definition: not having official authority or sanction