The Collaborative International Dictionary of English v.0.48:

Reparation \Rep`a*ra"tion\ (-r?"sh?n), n. [F. r['e]paration, L.
   reparatio. See Repair to mend.]
   1. The act of renewing, restoring, etc., or the state of
      being renewed or repaired; as, the reparation of a bridge
      or of a highway; -- in this sense, repair is oftener used.
      --Arbuthnot.
      [1913 Webster]

   2. The act of making amends or giving satisfaction or
      compensation for a wrong, injury, etc.; also, the thing
      done or given; amends; satisfaction; indemnity; --used,
      e.g. in the phrase

   make reparation,

   pay reparations, or

   make reparations.
      [1913 Webster +PJC]

            I am sensible of the scandal I have given by my
            loose writings, and make what reparation I am able.
                                                  --Dryden.
      [1913 Webster]

   Syn: Restoration; repair; restitution; compensation; amends;
        satisfaction.
        [1913 Webster]

WordNet (r) 3.0 (2006):

reparation
    n 1: compensation (given or received) for an insult or injury;
         "an act for which there is no reparation"
    2: (usually plural) compensation exacted from a defeated nation
       by the victors; "Germany was unable to pay the reparations
       demanded after World War I"
    3: the act of putting something in working order again [syn:
       repair, fix, fixing, fixture, mend, mending,
       reparation]
    4: something done or paid in expiation of a wrong; "how can I
       make amends" [syn: reparation, amends]

The Devil's Dictionary (1881-1906):

REPARATION, n.  Satisfaction that is made for a wrong and deducted
from the satisfaction felt in committing it.