/ Dictionary / Index F Foundation Day: Meaning and Definition of Find definitions for: Founda'tion Day" Pronunciation: [key] former name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. foundation foundation garment Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language