Source : Webster's Revised Unabridged Dictionary (1913)

Batten \Bat"ten\, v. t. [imp. & p. p. {Battened} (?); p. pr. &
   vb. n. {Battening}.] [See {Batful}.]
   1. To make fat by plenteous feeding; to fatten. ``Battening
      our flocks.'' --Milton.

   2. To fertilize or enrich, as land.