#1 commutation n. [commuting] the travel of a commuter. wn
#2 commutation n. a warrant substituting a lesser punishment for a greater one. wn
#3 commutation n. [re-sentencing] (law) the reduction in severity of a punishment imposed by law. wn
#4 commutation n. [substitution, exchange] 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". wn
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