Source : Webster's Revised Unabridged Dictionary (1913)

Leafless \Leaf"less\, a.
   Having no leaves or foliage; bearing no foliage. ``Leafless
   groves.'' --Cowper. -- {Leaf"less*ness}, n.

   {Leafless plants}, plants having no foliage, though leaves
      may be present in the form of scales and bracts. See
      {Leaf}, n., 1 and 2.

Source : WordNet®

leafless
     adj : having no leaves [ant: {leafy}]