The Collaborative International Dictionary of English v.0.48:

Restitution \Res`ti*tu"tion\ (r?s`t?*t?"sh?n), n. [F.
   restitution, L. restitutio. See Restitute, v.]
   1. The act of restoring anything to its rightful owner, or of
      making good, or of giving an equivalent for any loss,
      damage, or injury; indemnification.
      [1913 Webster]

            A restitution of ancient rights unto the crown.
                                                  --Spenser.
      [1913 Webster]

            He restitution to the value makes.    --Sandys.
      [1913 Webster]

   2. That which is offered or given in return for what has been
      lost, injured, or destroved; compensation.
      [1913 Webster]

   3. (Physics) The act of returning to, or recovering, a former
      state; as, the restitution of an elastic body.
      [1913 Webster]

   4. (Med.) The movement of rotetion which usually occurs in
      childbirth after the head has been delivered, and which
      causes the latter to point towards the side to which it
      was directed at the beginning of labor.
      [1913 Webster]

   Syn: Restoration; return; indemnification; reparation;
        compensation; amends; remuneration.
        [1913 Webster]

WordNet (r) 3.0 (2006):

restitution
    n 1: a sum of money paid in compensation for loss or injury
         [syn: damages, amends, indemnity, indemnification,
         restitution, redress]
    2: the act of restoring something to its original state
    3: getting something back again; "upon the restitution of the
       book to its rightful owner the child was given a tongue
       lashing" [syn: restitution, return, restoration,
       regaining]

Moby Thesaurus II by Grady Ward, 1.0:

100 Moby Thesaurus words for "restitution":
   about-face, amends, atonement, backing, backsliding, balancing,
   blood money, commutation, compensation, composition, compromise,
   consideration, counteraction, counterbalancing, damages,
   disenchantment, expiation, expiatory offering, flip-flop, guerdon,
   honorarium, improvement, indemnification, indemnity, instauration,
   kickback, lapse, lex talionis, making amends, making good,
   making right, making up, meed, offsetting, peace offering,
   piaculum, price, propitiation, quittance, reactivation,
   recidivation, recidivism, reclamation, recompense, reconstitution,
   reconversion, recoupment, recovery, rectification, redemption,
   redintegration, redress, reenactment, reestablishment, reformation,
   refund, refundment, regress, regression, rehabilitation,
   reimbursement, reinstatement, reinstation, reinstitution,
   reinvestiture, reinvestment, relapse, remuneration, reparation,
   repayment, replacement, reprisal, requital, requitement,
   restoration, retaliation, retribution, retrocession,
   retrogradation, retrogression, retroversion, return, returning,
   revenge, reversal, reverse, reversion, reverting, revulsion,
   reward, salvage, satisfaction, slipping back, smart money,
   solatium, squaring, substitution, turn, turnabout, wergild



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

RESTITUTION, practice. The return of something to the owner of it, or to the
person entitled to it.
     2. After property has been taken into execution, and the judgment has
been reversed or set aside, the party against whom the execution was sued
out shall have restitution, and this is enforced by a writ of restitution.
Cro. Jac. 698; 4 Mod. 161. When the thing levied upon under an execution has
not been sold, the thing itself shall be restored; when it has been sold,
the price for which it is sold is to be restored. Roll. Ab. 778; Bac. Ab.
Execution, Q; 1 Al. & S. 425.
     3. The phrase restitution of conjugal rights frequently occurs in the
ecclesiastical courts. A suit may there be brought for this purpose whenever
either the husband or wife is guilty of the injury of subtraction, or lives
separate from the other without sufficient reason; by which the party
injured may compel the other to return to cohabitation. 1 Bl. Com. 94; 1
Addams, R. 305; 3 Hagg. Eccl. R. 619.



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

RESTITUTION, maritime law. The placing back or restoring articles which have
been lost by jettison; this is done when the remainder of the cargo has been
saved at the general charge of the owners of the cargo; but when the
remainder of the goods are afterwards lost, there is not any restitution.
Stev. on Av. 1, c. 1, s. 1, art. 1, ii., 8. Vide Recompense.