adj. 25B6; adjective UNPARALLELED, unequalled, unmatched, unrivalled, without parallel, without equal, out of the ordinary, unusual, exceptional, singular, remarkable, unique; unheard of, unknown, new, ground-breaking, revolutionary, pioneering; formal unexampled.
UNPRECEDENTED
Meaning of UNPRECEDENTED in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012