Of variables or operators, in mathematics

• Travel back and forth regularly, as between one's place of work and home
• Exchange a penalty for a less severe one
• Change the order or arrangement of
• Transpose and remain equal in value
• Exchange or replace with another, usually of the same kind or category

Wikipedia Word definitions in Wikipedia
Commuting is periodically recurring travel between one's place of residence and place of work, or study, and in doing so exceed the boundary of their residential community. It sometimes refers to any regular or often repeated traveling between locations, ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
commuting \commuting\ n. the process of travel by a commuter. Syn: commutation.

Wiktionary Word definitions in Wiktionary
Causing, or involved in commutation n. 1 travel between home and workplace 2 (context Philippines English) travel by public transportation such as by jeepney v (present participle of commute English)

WordNet Word definitions in WordNet
n. the travel of a commuter [syn: commutation ]