1

diurnal

adjective di·ur·nal \ dī-ˈər-nᵊl \
Updated on: 11 Dec 2017

Definition of diurnal

1 a : recurring every day
  • diurnal tasks
b : having a daily cycle
  • diurnal tides
2 a : of, relating to, or occurring in the daytime
  • the city's diurnal noises
b biology : active chiefly in the daytime
  • diurnal animals
c botany : opening during the day and closing at night
  • diurnal flowers

diurnally

play \-nᵊl-ē\ adverb

diurnal was our Word of the Day on 07/05/2009. Hear the podcast!

Examples of diurnal in a Sentence

  1. a love as constant and certain as the diurnal tides

Recent Examples of diurnal from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diurnal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of diurnal

Middle English, from Latin diurnalis — more at journal


2

diurnal

noun

Definition of diurnal

1 archaic : diary, daybook
2 : journal 1a

Examples of diurnal in a Sentence

  1. a microfilm containing a collection of diurnals published by 19th-century American abolitionists

Origin and Etymology of diurnal


DIURNAL Defined for English Language Learners

diurnal

adjective

Definition of diurnal for English Language Learners

  • : active mainly during the day

  • : happening every day


Medical Dictionary

diurnal

adjective di·ur·nal \ dī-ˈərn-ᵊl \

medical Definition of diurnal

1 : having a daily cycle
  • diurnal rhythms
2 a : of, relating to, or occurring in the daytime
  • diurnal activity
b : chiefly active during the daytime
  • diurnal mosquitoes

diurnally

play \-ᵊl-ē\ adverb


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