/ Dictionary / Index A ADS: Meaning and Definition of Find definitions for: ADS Pronunciation: [key] American Dialect Society. a.d.s. Pronunciation: [key] autograph document, signed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ads (Thesaurus) à droite* adscititious Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language