Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Lasting through the whole day.
  • adverb Through the day; all day.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Which lasts a day, or approximately so.
  • adverb Throughout the day.

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

  • adjective lasting through an entire day
  • adverb during the entire day

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

day +‎ -long

Examples

Comments

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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