from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Lasting three days.
  • adj. Happening every third day.
  • n. An event lasting three days.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Lasting three lays; also, happening every third day.

from The Century Dictionary and Cyclopedia

  • Lasting three days, or happening every third day.


From triduum ("space of three days"). (Wiktionary)


  • In the following night the storm terminated its triduan existence some time between darkness and dawn.

    The Mayor of Warwick

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