D defs.my
Entry 2 senses Webster, 1913

Eve

/(ēv)/ · IPA /iːv/
01 n. Evening.
  1. 1.
    Evening.[Poetic]
    “Winter oft, at eve resumes the breeze.” Thomson.
  2. 2.
    The evening before a holiday, -- from the Jewish mode of reckoning the day as beginning at sunset, not at midnight; as, Christmas eve is the evening before Christmas; also, the period immediately preceding some important event.
Phrases & compounds
Eve churr — the European goatsucker or nightjar; -- called also night churr, and churr owl.