Source : Webster's Revised Unabridged Dictionary (1913)

Superhuman \Su`per*hu"man\, a.
   Above or beyond what is human; sometimes, divine; as,
   superhuman strength; superhuman wisdom.

Source : WordNet®

superhuman
     adj : above or beyond the human or demanding more than human power
           or endurance; "superhuman beings"; "superhuman
           strength"; "soldiers driven mad by superhuman misery"
           [ant: {subhuman}]