Source : Webster's Revised Unabridged Dictionary (1913)

Brawny \Brawn"y\, a.
   Having large, strong muscles; muscular; fleshy; strong.
   ``Brawny limbs.'' --W. Irving.

   Syn: Muscular; fleshy; strong; bulky; sinewy; athletic;
        stalwart; powerful; robust.

Source : WordNet®

brawny
     adj : (of a person) possessing physical strength and weight;
           rugged and powerful; "a hefty athlete"; "a muscular
           boxer"; "powerful arms" [syn: {hefty}, {muscular}, {powerful},
            {sinewy}]
     [also: {brawniest}, {brawnier}]