Source : Webster's Revised Unabridged Dictionary (1913)

Unmoral \Un*mor"al\, a.
   Having no moral perception, quality, or relation; involving
   no idea of morality; -- distinguished from both moral and
   immoral. -- {Un`mo*ral"i*ty}, n.

Source : WordNet®

unmoral
     adj : without moral standards or principles; "a completely amoral
           person" [syn: {amoral}] [ant: {moral}, {immoral}]