Search Result for "blackmailer": 
Wordnet 3.0

NOUN (1)

1. a criminal who extorts money from someone by threatening to expose embarrassing information about them;
[syn: blackmailer, extortioner, extortionist]



The Collaborative International Dictionary of English v.0.48:

Blackmailer \Black"mail`er\, n.
   One who extorts, or endeavors to extort, money, by black
   mailing.
   [1913 Webster]


WordNet (r) 3.0 (2006):

blackmailer
    n 1: a criminal who extorts money from someone by threatening to
         expose embarrassing information about them [syn:
         blackmailer, extortioner, extortionist]