Source : Webster's Revised Unabridged Dictionary (1913)

Grassy \Grass"y\a.
   1. Covered with grass; abounding with grass; as, a grassy
      lawn. --Spenser.

   2. Resembling grass; green.

Source : WordNet®

grassy
     adj : abounding in grass [ant: {grassless}]
     [also: {grassiest}, {grassier}]