/ Dictionary / Index S snow day: Meaning and Definition of Find definitions for: snow' day" Pronunciation: [key] a day on which public schools or other institutions are closed due to heavy snow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. snow crystal Snowdon Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language