crepuscular
Americanadjective
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of, relating to, or resembling twilight; dim; indistinct.
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Zoology. appearing or active in the twilight, as certain bats and insects.
adjective
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of or like twilight; dim
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(of certain insects, birds, and other animals) active at twilight or just before dawn
Etymology
Origin of crepuscular
First recorded in 1660–70; crepuscule + -ar 1
Explanation
The adjective crepuscular describes anything that's related to twilight, like the crepuscular glow of the dimming light on a lake as darkness falls. If the light outside is fading, you can call it crepuscular. Anything that resembles dusk, or happens at that time of day, is crepuscular, whether it's gloomy indoor light or the sky at twilight. Some animals are also crepuscular: they tend to be most active in the evening. The Latin root word says it all — crepusculum means "twilight."
Vocabulary lists containing crepuscular
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Nightjars are crepuscular ground-nesting birds meaning they emerge at twilight and can be seen hunting for food at dusk and dawn.
From BBC • Mar. 16, 2026
The catalog’s full-page reproductions, in spectacular colors or crepuscular monochromes, are frequently transporting.
From The Wall Street Journal • Nov. 21, 2025
For instance, ungulates, such as bison, and coyotes are generally crepuscular, or most active at dusk and dawn, whereas alligators are diurnal and nocturnal.
From Washington Post • Jun. 22, 2022
His color palettes, which can range from brilliant orange and blue to crepuscular pinks and purples, seem to evoke land, sky and light in its myriad reflective and refractive states.
From Los Angeles Times • May 12, 2022
And Daddy is smiling like he’s feeling the sun on his skin after a lifetime in a crepuscular cave.
From "Odd One Out" by Nic Stone
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
