/ Dictionary / Index F fluoridation: Meaning and Definition of Find definitions for: fluor•i•da•tion Pronunciation: (floor"i-dā'shun, flôr"-, flōr"-), [key] — n. the addition of fluorides to the public water supply to reduce the incidence of tooth decay. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fluoridation (Thesaurus) fluoridate fluoride Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language