/ Dictionary / Index F First day: Meaning and Definition of Find definitions for: First' day" Pronunciation: [key] (among Quakers) Sunday. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. first dark first-day cover Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language