Webster's 1828 Dictionary
UNSURPASSED
a.Not surpassed; not exceeded.
New American Oxford Dictionary
unsurpassed
un sur passed |ˌənsərˈpast ˌənsərˈpæst | ▶adjective as good as or better than any other: the quality of workmanship is unsurpassed.
Oxford Dictionary
unsurpassed
un |sur ¦passed |ʌnsəˈpɑːst | ▶adjective better or greater than any other: the quality of workmanship is unsurpassed.
American Oxford Thesaurus
unsurpassed
unsurpassed adjective Lubell is unsurpassed in season wins: unmatched, unrivaled, unparalleled, unequaled, matchless, peerless, without equal, nonpareil, inimitable, incomparable, unsurpassable; formal unexampled.
Oxford Thesaurus
unsurpassed
unsurpassed adjective Beethoven's nine unsurpassed masterpieces: unmatched, unrivalled, unparalleled, unequalled, matchless, peerless, without peer, without equal, in a class of its own, all-time best, inimitable, incomparable, beyond compare, beyond comparison, second to none, unsurpassable, surpassing, nonpareil; unique, consummate, perfect, rare, exquisite, transcendent, superlative, supreme, outstanding, pre-eminent, top, towering, leading, foremost, premier, the best; rare unexampled; French hors concours; (be unsurpassed ) stand alone. ANTONYMS inferior; eclipsed.
Sanseido Wisdom Dictionary
unsurpassed
ù n sur p á ssed /-t /形容詞 〈技術 成果などが 〉比類ない, 非常にすぐれた, 卓越した .
The Wordsmith Dictionary