Commutation/ˌkɑːmjuˈteɪʃn/ Definition 1 of 3Pro Tip 1/3Transformation Usage Used to describe a change in form, quality, or condition. Her commutation from a shy girl to a confident speaker was remarkable. Pro Tip 2/3Not Physical Change Indicates metaphorical or abstract changes, not usually physical alterations. The story depicted the commutation of the character's feelings. Pro Tip 3/3Avoid Overuse Use sparingly; 'commutation' can seem overly formal in casual conversation. In a casual talk, 'change' is preferred over 'commutation'.