Source : Webster's Revised Unabridged Dictionary (1913)

Athletic \Ath`let"ic\, a. [L. athleticus, Gr. ?. See {Athlete}.]
   1. Of or pertaining to athletes or to the exercises practiced
      by them; as, athletic games or sports.

   2. Befitting an athlete; strong; muscular; robust; vigorous;
      as, athletic Celts. ``Athletic soundness.'' --South. --
      {Ath*let"ic*al*ly}, adv.

Source : WordNet®

athletic
     adj 1: relating to or befitting athletics or athletes; "athletic
            facilities"
     2: vigorously active; "an acrobatic dance"; "an athletic
        child"; "athletic playing"; "gymnastic exercises" [syn: {acrobatic},
         {gymnastic}]
     3: having a sturdy and well proportioned body; "an athletic
        build"