Webster's 1828 Dictionary
UNAUTHORIZED
a.Not authorized; not warranted by proper authority; not duly commissioned.
New American Oxford Dictionary
unauthorized
un au thor ized |ˌənˈôTHəˌrīzd ʌnˈɔːθəraɪzd | ▶adjective not having official permission or approval: unauthorized access to the computer system.
Oxford Dictionary
unauthorized
unauthorized |ʌnˈɔːθərʌɪzd |(also unauthorised ) ▶adjective not having official permission or approval: unauthorized access to the computer system.
American Oxford Thesaurus
unauthorized
unauthorized adjective you can't hold an unauthorized meeting in a town building: unofficial, unsanctioned, unaccredited, unlicensed, unwarranted, unapproved, bootleg, pirated; wildcat; disallowed, prohibited, out of bounds, banned, barred, forbidden, outlawed, illegal, illegitimate, illicit, proscribed. ANTONYMS official.
Oxford Thesaurus
unauthorized
unauthorized adjective they issued a ban on all unauthorized rallies: unofficial, unsanctioned, uncertified, unaccredited, unlicensed, unwarranted, unapproved; disallowed, prohibited, banned, barred, forbidden, outlawed, illegal, illegitimate, illicit, interdicted, proscribed; informal wildcat. ANTONYMS authorized, official, lawful.
Sanseido Wisdom Dictionary
unauthorized
ù n á u tho rized 形容詞 認可されていない, 未公認の .