Search Result for "commutation": 
Wordnet 3.0

NOUN (4)

1. the travel of a commuter;
[syn: commutation, commuting]

2. a warrant substituting a lesser punishment for a greater one;

3. (law) the reduction in severity of a punishment imposed by law;
[syn: commutation, re-sentencing]

4. the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help";
[syn: substitution, exchange, commutation]

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4 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Commutation \Com`mu*ta"tion\, n. [L. commutatio: cf. F. commutation.] 1. A passing from one state to another; change; alteration; mutation. [R.] [1913 Webster] So great is the commutation that the soul then hated only that which now only it loves. --South. [1913 Webster] 2. The act of giving one thing for another; barter; exchange. [Obs.] [1913 Webster] The use of money is . . . that of saving the commutation of more bulky commodities. --Arbuthnot. [1913 Webster] 3. (Law) The change of a penalty or punishment by the pardoning power of the State; as, the commutation of a sentence of death to banishment or imprisonment. [1913 Webster] Suits are allowable in the spiritual courts for money agreed to be given as a commutation for penance. --Blackstone. [1913 Webster] 4. A substitution, as of a less thing for a greater, esp. a substitution of one form of payment for another, or one payment for many, or a specific sum of money for conditional payments or allowances; as, commutation of tithes; commutation of fares; commutation of copyright; commutation of rations. [1913 Webster] 5. regular travel from a place of residence to a place where one's daily work is performed; commuting. Most often, such travel is performed between a suburb and a nearby city. [1913 Webster] Angle of commutation (Astron.), the difference of the geocentric longitudes of the sun and a planet. Commutation of tithes, the substitution of a regular payment, chargeable to the land, for the annual tithes in kind. Commutation ticket, a ticket, as for transportation, which is the evidence of a contract for service at a reduced rate. See 2d Commute, 2. [1913 Webster]
WordNet (r) 3.0 (2006):

commutation n 1: the travel of a commuter [syn: commutation, commuting] 2: a warrant substituting a lesser punishment for a greater one 3: (law) the reduction in severity of a punishment imposed by law [syn: commutation, re-sentencing] 4: the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help" [syn: substitution, exchange, commutation]
Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "commutation": agency, alternation, amends, atonement, balancing, battledore and shuttlecock, change, compensation, cooperation, counteraction, counterbalancing, counterchange, course, cross fire, crossing, delegation, deputation, deputyship, displacement, exchange, expiation, give-and-take, globe-trotting, going, indemnification, indemnity, interchange, intermutation, interplay, journeying, lex talionis, locomotion, measure for measure, motion, movement, moving, mutual admiration, mutual support, mutual transfer, mutuality, offsetting, passage, permutation, power of attorney, progress, quid pro quo, reciprocality, reciprocation, reciprocity, recompense, rectification, redress, reparation, repayment, replacement, representation, restitution, retaliation, revenge, satisfaction, something for something, subrogation, substitution, supersedence, superseding, supersedure, supersession, supplantation, supplanting, supplantment, switch, tit for tat, tourism, touristry, traject, trajet, transit, transposal, transposition, travel, traveling, vicariousness
Bouvier's Law Dictionary, Revised 6th Ed (1856):

COMMUTATION, punishments. The change of a punishment to which a person has been condemned into a less severe one. This can be granted only by the executive authority in which the pardoning power resides.