Source : Webster's Revised Unabridged Dictionary (1913)

Horny \Horn"y\, a. [Compar. {Hornier}; superl. {Horniest}.]
   1. Having horns or hornlike projections. --Gay.

   2. Composed or made of horn, or of a substance resembling
      horn; of the nature of horn. ``The horny . . . coat of the
      eye.'' --Ray.

   3. Hard; callous. ``His horny fist.'' --Dryden.

Source : WordNet®

horny
     adj 1: feeling great sexual desire; "feeling horny" [syn: {aroused},
             {randy}, {ruttish}, {turned on(p)}]
     2: having horns or hornlike projections; "horny coral"; "horny
        (or horned) frog"
     3: made of horn (or of a substance resembling horn) [syn: {corneous},
         {hornlike}]
     [also: {horniest}, {hornier}]