/ Dictionary / Index P promoter: Meaning and Definition of Find definitions for: pro•mot•er Pronunciation: (pru-mō'tur), [key] — n. a person or thing that promotes, furthers, or encourages. a person who initiates or takes part in the organizing of a company, development of a project, etc. a person who organizes and provides financial backing for a sporting event or entertainment. any substance that in small amounts is capable of increasing the activity of a catalyst. Also calleda water-repellent reagent enhancing the ability of certain ores to float so that they can be extracted by the flotation process. a site on a DNA molecule at which RNA polymerase binds and initiates transcription. a gene sequence that activates transcription. an informer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: promoter (Thesaurus) promote promoter of the faith Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language