Source : Webster's Revised Unabridged Dictionary (1913)

Bilk \Bilk\, v. t. [imp. & p. p. {Bilked}; p. pr. & vb. n.
   {Bilking}.] [Origin unknown. Cf. {Balk}.]
   To frustrate or disappoint; to deceive or defraud, by
   nonfulfillment of engagement; to leave in the lurch; to give
   the slip to; as, to bilk a creditor. --Thackeray.

Bilk \Bilk\, n.
   1. A thwarting an adversary in cribbage by spoiling his
      score; a balk.

   2. A cheat; a trick; a hoax. --Hudibras.

   3. Nonsense; vain words. --B. Jonson.

   4. A person who tricks a creditor; an untrustworthy, tricky
      person. --Marryat.

Source : WordNet®

bilk
     v 1: cheat somebody out of what is due, especially money
     2: hinder or prevent (the efforts, plans, or desires) of; "What
        ultimately frustrated every challenger was Ruth's amazing
        September surge"; "foil your opponent" [syn: {thwart}, {queer},
         {spoil}, {scotch}, {foil}, {cross}, {frustrate}, {baffle}]
     3: evade payment to; "He bilked his creditors"
     4: escape, either physically or mentally; "The thief eluded the
        police"; "This difficult idea seems to evade her"; "The
        event evades explanation" [syn: {elude}, {evade}]