Source : Webster's Revised Unabridged Dictionary (1913)

Deviant \De"vi*ant\, a.
   Deviating. [Obs.]

Source : WordNet®

deviant
     adj : markedly different from an accepted norm; "aberrent
           behavior"; "deviant ideas" [syn: {aberrant}]
     n : a person whose behavior deviates from what is acceptable
         especially in sexual behavior [syn: {pervert}, {deviate},
          {degenerate}]