What is the meaning of diurnal?

adjective

  • Of or belonging to or active during the day.
    • usage: "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"; "diurnal and nocturnal offices"
  • Having a daily cycle or occurring every day.
    • usage: "diurnal rotation of the heavens"
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). Diurnal. Retrieved October 2, 2026, from http://smartdefine.org/diurnal/definitions/1172712
ChicagoWordNet. 2010. "Diurnal" http://smartdefine.org/diurnal/definitions/1172712 (accessed October 2, 2026).
HarvardWordNet 2010, Diurnal, Smart Define, viewed 2 October, 2026, <http://smartdefine.org/diurnal/definitions/1172712>.
MLAWordNet. "Diurnal" 23 October 2010. Web. 2 October 2026. <http://smartdefine.org/diurnal/definitions/1172712>
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