Source : Webster's Revised Unabridged Dictionary (1913)

Timeless \Time"less\, a.
   1. Done at an improper time; unseasonable; untimely. [R.]

            Nor fits it to prolong the heavenly feast Timeless,
            indecent.                             --Pope.

   2. Done or occurring before the proper time; premature;
      immature; as, a timeless grave. [Obs.]

            Must I behold thy timeless, cruel death? --Shak.

   3. Having no end; interminable; unending. ``Timeless night
      and chaos.'' --Young.

Source : WordNet®

timeless
     adj : unaffected by time; "few characters are so dateless as
           Hamlet"; "Helen's timeless beauty" [syn: {dateless}]