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Definitions of diurnal
  1. adjective
    having a daily cycle or occurring every day
    "diurnal rotation of the heavens"

    Similar: 

  2. adjective
    of or belonging to or active during the day
    "diurnal animals are active during the day" "diurnal flowers are open during the day and closed at night" "diurnal and nocturnal offices"
    Opposite:
Examples of diurnal
  • "diurnal rotation of the heavens"
  • "diurnal animals are active during the day"
  • "diurnal flowers are open during the day and closed at night"
  • "diurnal and nocturnal offices"
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