Source : Webster's Revised Unabridged Dictionary (1913)

Unparalleled \Un*par"al*leled\, a.
   Having no parallel, or equal; unequaled; unmatched.

         The unparalleled perseverance of the armies of the
         United States, under every suffering and
         discouragement, was little short of a miracle.
                                                  --Washington.

Source : WordNet®

unparalleled
     adj : radically distinctive and without equal; "he is alone in the
           field of microbiology"; "this theory is altogether
           alone in its penetration of the problem"; "Bach was
           unique in his handling of counterpoint"; "craftsmen
           whose skill is unequaled"; "unparalleled athletic
           ability"; "a breakdown of law unparalleled in our
           history" [syn: {alone(p)}, {unique}, {unequaled}, {unequalled}]