nocturnal

adjective
noc·​tur·​nal | \ näk-ˈtər-nᵊl \

Definition of nocturnal

1 : of, relating to, or occurring in the night a nocturnal journey nocturnal activities
2 : active at night a nocturnal predator nocturnal insects, such as mosquitoes

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Other Words from nocturnal

nocturnally \ -​nᵊl-​ē \ adverb

Synonyms & Antonyms for nocturnal

Synonyms

night, nightly, nighttime

Antonyms

daily, diurnal

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Examples of nocturnal in a Sentence

he bought a new telescope so he could pursue his favorite nocturnal hobby of astronomy

Recent Examples on the Web

During this lunation, the sun and moon occupy the same sign, so there is no nocturnal illumination. Aliza Kelly Faragher, Allure, "What November's Aquarius Horoscope Means for You," 28 Oct. 2018 Triatomines are nocturnal and tend to live in cracks and holes in rocks and buildings; underneath porches, concrete, rock, wood, brush piles, and tree bark; or in rodent nests or animal burrows. Bartie Scott, Teen Vogue, "Disease Spread by Kissing Bug Could Become More Common in the U.S.," 21 Aug. 2018 Many species of cockroaches and rats have also become nocturnal. Rob Dunn, Discover Magazine, "Our Attempts to Eradicate Insects are Just Making them Resistant to Pesticides," 16 Nov. 2018 And with nature and the environment being at the core of Flora, a naturalist will be there to point out constellations like the Southern Cross and the Big Dipper, and talk about the surrounding nocturnal wildlife. Erin Florio, Condé Nast Traveler, "You Can Sleep Under the Stars in the Galapagos on this New Cruise," 14 Nov. 2018 Ruby Rose, who became the first openly gay superhero upon her casting announcement at Batwoman this summer, has finally suited up as the nocturnal crime fighter. D. Elizabeth, Glamour, "Your First Look at Ruby Rose as Batwoman Is Here," 9 Oct. 2018 Remember, new moons occur when the sun and moon occupy the same sign, so during this lunation, there is nocturnal visibility. Aliza Kelly Faragher, Allure, "What October's Aries Horoscope Means for You," 30 Sep. 2018 Clean up any garden debris and mulches, especially around the foundations of your home, since moist areas serve as daytime hiding spots for the nocturnal earwigs and can lead to them invading your home. The Editors, Good Housekeeping, "How to Control Earwigs in Your Garden and Keep Them From Getting in Your House," 27 July 2018 While other animals like nocturnal songbirds and sea turtles are known to migrate by Earth’s magnetic fields, the researchers say this is the first reliable evidence that insects can, too. Joanna Klein, New York Times, "Magnetic Sense Helps Billions of Moths on an Australian Migration," 21 June 2018

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

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First Known Use of nocturnal

15th century, in the meaning defined at sense 1

History and Etymology for nocturnal

Middle English, borrowed from Anglo-French & Late Latin; Anglo-French nocturnel, borrowed from Late Latin nocturnālis "for night use," from Latin nocturnus "of or occurring at night" (from noct-, nox night entry 1 + -urnus, temporal suffix, as in diurnus "of the day") + -ālis -al entry 1 — more at journal

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Dictionary Entries near nocturnal

Noctuidae

noctule

nocturn

nocturnal

nocturnality

nocturne

nocuous

Statistics for nocturnal

Last Updated

20 Dec 2018

Look-up Popularity

Time Traveler for nocturnal

The first known use of nocturnal was in the 15th century

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More Definitions for nocturnal

nocturnal

adjective

English Language Learners Definition of nocturnal

: active mainly during the night

: happening at night

nocturnal

adjective
noc·​tur·​nal | \ näk-ˈtər-nᵊl \

Kids Definition of nocturnal

1 : happening at night a nocturnal journey
2 : active at night nocturnal insects

nocturnal

adjective
noc·​tur·​nal | \ näk-ˈtərn-ᵊl \

Medical Definition of nocturnal

1 : of, relating to, or occurring at night nocturnal myoclonus
2 : characterized by nocturnal activity a nocturnal form of filariasis

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Comments on nocturnal

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