Main Entry: com·mu·ta·tion

Pronunciation: \ˌkäm-yə-ˈtā-shən, -yü-\

Function: noun

Etymology: Middle English commutacion, from Anglo-French, from Latin commutation-, commutatio, from commutare

Date: 15th century

1 : exchange, trade
2 : replacement; specifically : a substitution of one form of payment or charge for another
3 : a change of a legal penalty or punishment to a lesser one <commutation of a death sentence>
4 : an act or process of commuting
5 : the action of commutating