Source : Webster's Revised Unabridged Dictionary (1913)

Exaction \Ex*ac"tion\, n. [L. exactio: cf. F. exaction.]
   1. The act of demanding with authority, and compelling to pay
      or yield; compulsion to give or furnish; a levying by
      force; a driving to compliance; as, the exaction to
      tribute or of obedience; hence, extortion.

            Take away your exactions from my people. --Ezek.
                                                  xlv. 9.

            Daily new exactions are devised.      --Shak.

            Illegal exactions of sheriffs and officials.
                                                  --Bancroft.

   2. That which is exacted; a severe tribute; a fee, reward, or
      contribution, demanded or levied with severity or
      injustice. --Daniel.

Source : WordNet®

exaction
     n : act of demanding or levying by force or authority; "exaction
         of tribute"; "exaction of various dues and fees"