/ Dictionary / Index C classified advertising: Meaning and Definition of Find definitions for: clas'sified ad'vertising Pronunciation: [key] classified ads collectively. the business or practice of selling space for classified ads. the department of a newspaper or other publication that handles classified advertising. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. classified ad classifier Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language