The Collaborative International Dictionary of English v.0.48:

Extort \Ex*tort"\, v. i.
   To practice extortion. [Obs.] --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Extort \Ex*tort"\, p. p. & a. [L. extortus. p. p.]
   Extorted. [Obs.] --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Extort \Ex*tort"\, v. t. [imp. & p. p. Extorted; p. pr. & vb.
   n. Extorting.] [L. extortus, p. p. of extorquere to twist
   or wrench out, to extort; ex out + torquere to turn about,
   twist. See Torsion.]
   1. To wrest from an unwilling person by physical force,
      menace, duress, torture, or any undue or illegal exercise
      of power or ingenuity; to wrench away (from); to tear
      away; to wring (from); to exact; as, to extort
      contributions from the vanquished; to extort confessions
      of guilt; to extort a promise; to extort payment of a
      debt.
      [1913 Webster]

   2. (Law) To get by the offense of extortion. See Extortion,
      2.
      [1913 Webster]

WordNet (r) 3.0 (2006):

extort
    v 1: obtain through intimidation
    2: obtain by coercion or intimidation; "They extorted money from
       the executive by threatening to reveal his past to the
       company boss"; "They squeezed money from the owner of the
       business by threatening him" [syn: extort, squeeze,
       rack, gouge, wring]
    3: get or cause to become in a difficult or laborious manner
       [syn: extort, wring from]