Source : Webster's Revised Unabridged Dictionary (1913)

Grazier \Gra"zier\, n.
   One who pastures cattle, and rears them for market.

         The inhabitants be rather . . . graziers than plowmen.
                                                  --Stow.

Source : WordNet®

grazier
     n : a rancher who grazes cattle or sheep for market