Pronunciation: (ku-mish'u-nur), [key]
1. a person commissioned to act officially; member of a commission.
2. a government official or representative in charge of a department or district: the police commissioner; the commissioner of a colony.
3. an official chosen by an athletic association to exercise broad administrative or judicial authority: the baseball commissioner.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.