/ Dictionary / Index C commissioner: Meaning and Definition of Find definitions for: com•mis•sion•er Pronunciation: (ku-mish'u-nur), [key] — n. a person commissioned to act officially; member of a commission. a government official or representative in charge of a department or district: the police commissioner; the commissioner of a colony. 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. See also: commissioner (Thesaurus) commissioned officer commission house Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language