/ Dictionary / Index A agent noun: Meaning and Definition of Find definitions for: a'gent noun" Pronunciation: [key] — Gram. Gram. a noun denoting the doer of an action, as editor or jogger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. agentive Agent Orange Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language