The Collaborative International Dictionary of English v.0.48:

Bulimia \Bu*lim"i*a\ (b[u^]*l[i^]m"[i^]*[.a]), Bulimy
\Bu"li*my\, n. [NL. bulimia, fr. Gr. boylimi`a, lit., ox-hunger;
   boy^s ox + limo`s hunger: cf. F. boulimie.]
   1. (Med.) A disease in which there is a perpetual and
      insatiable appetite for food; a diseased and voracious
      appetite.
      [1913 Webster]

   2. a disordered eating habit characterized by occasional
      episodes of excessive eating, followed by self-induced
      vomiting or abuse of laxatives, to avoid gaining weight;
      it is often accompanied by feelings of guilt; -- called
      also bulimia nervosa and binge-purge syndrome. It is
      observed mainly in young women of normal weight.
      [PJC]

WordNet (r) 3.0 (2006):

bulimia
    n 1: a disorder of eating seen among young women who go on
         eating binges and then feel guilt and depression and self-
         condemnation [syn: bulimia, binge-eating syndrome]
    2: pathologically insatiable hunger (especially when caused by
       brain lesions)