Source : Webster's Revised Unabridged Dictionary (1913)

Expropriation \Ex*pro`pri*a"tion\, n. [Cf. F. expropriation.]
   The act of expropriating; the surrender of a claim to
   exclusive property; the act of depriving of ownership or
   proprietary rights. --W. Montagu.

         The expropriation of bad landlords.      --M. Arnold.

Source : WordNet®

expropriation
     n : taking out of an owner's hands (especially taking property
         by public authority)