Source : Webster's Revised Unabridged Dictionary (1913)

Tallow \Tal"low\, v. t. [imp. & p. p. {Tallowed}; p. pr. & vb.
   n. {Tallowing}.]
   1. To grease or smear with tallow.

   2. To cause to have a large quantity of tallow; to fatten;
      as, tallow sheep.