'extortionist' definitions:

Definition of 'extortionist'

(from WordNet)
noun
A criminal who extorts money from someone by threatening to expose embarrassing information about them [syn: blackmailer, extortioner, extortionist]

Definition of 'extortionist'

From: GCIDE
  • extortionist \ex*tor"tion*ist\, n. One who practices extortion.
  • Syn: extortioner. [PJC]