definition of
commutation

[1] #1 commutation n. [commuting] the travel of a commuter. wn

[2] #2 commutation n. a warrant substituting a lesser punishment for a greater one. wn

[3] #3 commutation n. [re-sentencing] (law) the reduction in severity of a punishment imposed by law. wn

[4] #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