from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Lasting through the whole day.
  • adv. Through the day; all day.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Which lasts a day, or approximately so.
  • adv. Throughout the day.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. lasting through an entire day
  • adv. during the entire day


day +‎ -long (Wiktionary)



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  • Daylong a duet of shade and light
    plays between these

    from "Two Sisters of Persephone," by Sylvia Plath

    April 14, 2008