Definition Definition

diurnal - Meaning and Examples

Meaning of 'diurnal' (Webster Dictionary)

1 . Diurnal [ a.]
- Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to nocturnal; as, diurnal heat; diurnal hours.
- Daily; recurring every day; performed in a day; going through its changes in a day; constituting the measure of a day; as, a diurnal fever; a diurnal task; diurnal aberration, or diurnal parallax; the diurnal revolution of the earth.
- Opening during the day, and closing at night; -- said of flowers or leaves.
- Active by day; -- applied especially to the eagles and hawks among raptorial birds, and to butterflies (Diurna) among insects.
- A daybook; a journal.
- A small volume containing the daily service for the "little hours," viz., prime, tierce, sext, nones, vespers, and compline.
- A diurnal bird or insect.

Meaning of 'diurnal' (Princeton's WordNet)

1 . diurnal [ a]
Meaning (1):
- of or belonging to or active during the day
Example in sentence:
  • diurnal and nocturnal offices;
  • diurnal animals are active during the day;
  • diurnal flowers are open during the day and closed at night
2 . diurnal [ s]
Meaning (2):
- having a daily cycle or occurring every day
Example in sentence:
  • diurnal rotation of the heavens