Definition of crepuscular in English:

crepuscular

adjective

  • 1Resembling or relating to twilight.

    • ‘It's a well-worn dichotomy, but the song's gently strummed guitar and the high, wending melody that draws nearer, moving like mysterious lights in the crepuscular sky, invest it with new promise.’
    • ‘It felt good to stretch my legs walking up the hill and the flowers were glorious in the crepuscular light.’
    • ‘Deskbound in the yellow room during the crepuscular hour, I'm typing scientific syntax, window flung open.’
    • ‘The last three miles go fast, and the canyon opens up to a crepuscular dome of sky.’
    • ‘Back in the crepuscular gloom of my Tyneside flat, the result seemed satisfactory.’
    • ‘Darkness breeds silence, and this show basks in crepuscular gloom.’
    indistinct, faint, vague, ill-defined, unclear, blurred, blurry, misty, hazy, foggy, veiled, cloudy, clouded, nebulous, fuzzy
    View synonyms
    1. 1.1Zoology
      (of an animal) appearing or active in twilight.
      • ‘Broadbills tend to show crepuscular activity patterns.’
      • ‘Most communication systems in luminescent fireflies have been studied in nocturnal species; little is known concerning communication in crepuscular and diurnal species.’
      • ‘Red foxes are terrestrial and either nocturnal or crepuscular.’
      • ‘Thus it may normally be crepuscular or nocturnal in its feeding and swimming behavior.’
      • ‘Most species of falconids are diurnal, though some are crepuscular.’

Origin

Mid 17th century: from Latin crepusculum twilight + -ar.

Pronunciation:

crepuscular

/krɪˈpʌskjʊlə//krɛˈpʌskjʊlə/