Wordnet 3.0
ADJECTIVE (1)
1. 
 subject to or used in the process of finishing or fattening up for slaughter; 
- Example: "a fattening hog"- Example: "fattening pens"
The Collaborative International Dictionary of English v.0.48:
Floating \Float"ing\, n.
   1. (Weaving) Floating threads. See Floating threads, above.
      [1913 Webster]
   2. The second coat of three-coat plastering. --Knight.
      [1913 Webster]
   3. The process of rendering oysters and scallops plump by
      placing them in fresh or brackish water; -- called also
      fattening, plumping, and laying out.
      [Webster 1913 Suppl.] Floating charge
The Collaborative International Dictionary of English v.0.48:
Fatten \Fat"ten\, v. t. [imp. & p. p. Fattened; p. pr. & vb.
   n. Fattening.] [See Fat, v. t.]
   1. To make fat; to feed for slaughter; to make fleshy or
      plump with fat; to fill full; to fat.
      [1913 Webster]
   2. To make fertile and fruitful; to enrich; as, to fatten
      land; to fatten fields with blood. --Dryden.
      [1913 Webster]
WordNet (r) 3.0 (2006):
fattening
    adj 1: subject to or used in the process of finishing or
           fattening up for slaughter; "a fattening hog"; "fattening
           pens"