The Collaborative International Dictionary of English v.0.48:

Fitch \Fitch\ (?; 224), n.; pl. Fitches. [See Vetch.]
   1. (Bot.) A vetch. [Obs.]
      [1913 Webster]

   2. pl. (Bot.) A word found in the Authorized Version of the
      Bible, representing different Hebrew originals. In Isaiah
      xxviii. 25, 27, it means the black aromatic seeds of
      Nigella sativa, still used as a flavoring in the East.
      In Ezekiel iv. 9, the Revised Version now reads spelt.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fitch \Fitch\, n. [Contr. of fitched.] (Zool.)
   The European polecat; also, its fur.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fitch
    n 1: dark brown mustelid of woodlands of Eurasia that gives off
         an unpleasant odor when threatened [syn: polecat,
         fitch, foulmart, foumart, Mustela putorius]