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]

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "reparation":
   adjustment, amends, atonement, balancing, blood money, commutation,
   compensation, composition, compromise, consideration, correction,
   counteraction, counterbalancing, damages, expiation,
   expiatory offering, fixing, guerdon, honorarium, indemnification,
   indemnity, lex talionis, making amends, making good, making right,
   making up, meed, mending, offsetting, overhaul, overhauling,
   paying back, peace offering, piaculum, price, propitiation,
   quittance, reclamation, recompense, rectification, redemption,
   redress, refund, reimbursement, remedy, remuneration, repair,
   repairing, repayment, reprisal, requital, requitement, restitution,
   retaliation, retribution, return, revenge, reward, salvage,
   satisfaction, settlement, smart money, solatium, squaring,
   substitution, troubleshooting, wergild



Bouvier's Law Dictionary, Revised 6th Ed (1856):

REPARATION. The redress of an injury; amends for a tort inflicted. Vide
Remedy; Redress.



The Devil's Dictionary (1881-1906):

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