Definition of crepuscular in English:

crepuscular

adjective

  • 1Of, resembling, or relating to twilight.

    • ‘It felt good to stretch my legs walking up the hill and the flowers were glorious in the crepuscular light.’
    • ‘Back in the crepuscular gloom of my Tyneside flat, the result seemed satisfactory.’
    • ‘Darkness breeds silence, and this show basks in crepuscular gloom.’
    • ‘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.’
    • ‘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.’
    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.
      • ‘Most communication systems in luminescent fireflies have been studied in nocturnal species; little is known concerning communication in crepuscular and diurnal species.’
      • ‘Most species of falconids are diurnal, though some are crepuscular.’
      • ‘Thus it may normally be crepuscular or nocturnal in its feeding and swimming behavior.’
      • ‘Broadbills tend to show crepuscular activity patterns.’
      • ‘Red foxes are terrestrial and either nocturnal or crepuscular.’

Origin

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

Pronunciation:

crepuscular

/krəˈpəskyələr/