of, relating to, or resembling twilight; dim; indistinct.
Zoology. appearing or active in the twilight, as certain bats and insects.

Origin of crepuscular

First recorded in 1660–70; crepuscule + -ar1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for crepuscular

Contemporary Examples of crepuscular

  • This crepuscular conflict requires a new vocabulary and a familiarity with a new type of history.

    The Daily Beast logo
    America's Terrorism Amnesia

    Lee Siegel

    January 5, 2010

Historical Examples of crepuscular

  • Through the crepuscular whiteness the trees hung in blotted masses.

    The Reef

    Edith Wharton

  • It is blended twilight of intellect and sensation; it is the crepuscular of thought.

  • She lay white, and as if suspended, in the crepuscular atmosphere of sunset mingling with the ashy gleam of the vast anchorage.

    Within the Tides

    Joseph Conrad

  • Some species of foxes, however, are twilight prowlers, and one or two of the fennecs are also crepuscular.

  • Crepuscular, kre-pus′kū-lar, adj. of or pertaining to twilight—also Crepus′culous.

British Dictionary definitions for crepuscular



of or like twilight; dim
(of certain insects, birds, and other animals) active at twilight or just before dawn

Word Origin for crepuscular

C17: from Latin crepusculum dusk, from creper dark
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for crepuscular

figurative use from 1660s; literal use from 1755, from Latin crepusculum "twilight, dusk," from creper "dusky," of unknown origin. Especially of evening twilight.

Online Etymology Dictionary, © 2010 Douglas Harper