1. To exchange a penalty for a less severe one; SYN. convert, exchange.
2. To transpose and remain equal in value; of variables or operators, in mathematics; SYN. transpose.
3. To travel back and forth regularly, as between one's place of work and home; SYN. travel back and forth.
4. Exchange especially for something less, or many small amounts for one large amount; substitute a lighter penalty for; travel regularly between home and work.

1. An act or an instance of commuting
2. The distance covered in commuting