Definitions for: Unprecedented

[adj] having no precedent; novel; "an unprecedented expansion in population and industry"

Webster (1913) Definition: Un*prec"e*dent*ed, a.
Having no precedent or example; not preceded by a like case;
not having the authority of prior example; novel; new;
unexampled. -- Un*prec"e*dent*ed*ly, adv.

Synonyms: new, unexampled

Antonyms: precedented