/ Dictionary / Index D daylong: Meaning and Definition of Find definitions for: day•long Pronunciation: (dā'lông", -long"), [key] — adj. during the entire day; lasting all day: a daylong trip. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: daylong (Thesaurus) day loan day man Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language