Source : Webster's Revised Unabridged Dictionary (1913)

Unexampled \Un`ex*am"pled\, a.
   Having no example or similar case; being without precedent;
   unprecedented; unparalleled. ``A revolution . . . unexampled
   for grandeur of results.'' --De Quincey.

Source : WordNet®

unexampled
     adj : having no previous example or precedent or parallel; "a time
           of unexampled prosperity" [syn: {new}]