The Collaborative International Dictionary of English v.0.48:

Repudiation \Re*pu`di*a"tion\ (r[-e]*p[=u]`d[i^]*[=a]"sh[u^]n),
   n. [Cf.F. r['e]pudiation, L. repudiatio.]
   The act of repudiating, or the state of being repuddiated;
   as, the repudiation of a doctrine, a wife, a debt, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Repudiation \Re*pu`di*a"tion\, n.
   One who favors repudiation, especially of a public debt.
   [1913 Webster]

WordNet (r) 3.0 (2006):

repudiation
    n 1: rejecting or disowning or disclaiming as invalid;
         "Congressional repudiation of the treaty that the President
         had negotiated" [syn: repudiation, renunciation]
    2: refusal to acknowledge or pay a debt or honor a contract
       (especially by public authorities); "the repudiation of the
       debt by the city"
    3: the exposure of falseness or pretensions; "the debunking of
       religion has been too successful" [syn: repudiation,
       debunking]