Commutation
/kˌɑmjəˈteɪʃən/
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Definition
(noun) Substitution of one thing for another; interchange.
Sentence Examples
I had my purse and commutation ticket stolen while I was sleeping on the train.
I was foolish enough to leave my commutation ticket at home.
CEFR Practice Quiz
The governor granted him a ____, reducing his life prison sentence.