Source : Webster's Revised Unabridged Dictionary (1913)

Fatten \Fat"ten\, v. t. [imp. & p. p. {Fattened}; p. pr. & vb.
   n. {Fattining}.] [See {Fat}, v. t.]
   1. To make fat; to feed for slaughter; to make fleshy or
      plump with fat; to fill full; to fat.

   2. To make fertile and fruitful; to enrich; as, to fatten
      land; to fatten fields with blood. --Dryden.