/ Dictionary / Index D Down's syndrome: Meaning and Definition of Find definitions for: Down's' syn'drome Pronunciation: [key] — Pathol. Pathol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. downspout downstage Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language