The Collaborative International Dictionary of English v.0.48:

Discomfit \Dis*com"fit\, v. t. [imp. & p. p. Discomfited; p.
   pr. & vb. n. Discomfiting.] [OF. desconfit, p. p. of
   desconfire, F. d['e]confire; fr. L. dis- + conficere to make
   ready, prepare, bring about. See Comfit, Fact.]
   1. To scatter in fight; to put to rout; to defeat.
      [1913 Webster]

            And his proud foes discomfit in victorious field.
                                                  --Spenser.
      [1913 Webster]

   2. To break up and frustrate the plans of; to balk? to throw
      into perplexity and dejection; to disconcert.
      [1913 Webster]

            Well, go with me and be not so discomfited. --Shak.

   Syn: To defeat; overthrow; overpower; vanquish; conquer;
        baffle; frustrate; confound; discourage.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Discomfit \Dis*com"fit\, a.
   Discomfited; overthrown. [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Discomfit \Dis*com"fit\, n.
   Rout; overthrow; discomfiture.
   [1913 Webster]

         Such a discomfit as shall quite despoil him. --Milton.
   [1913 Webster] discomfited

WordNet (r) 3.0 (2006):

discomfit
    v 1: cause to lose one's composure [syn: upset, discompose,
         untune, disconcert, discomfit]