The Collaborative International Dictionary of English v.0.48:
Eve \Eve\ ([=e]v), n. [See Even, n.]
1. Evening. [Poetic]
Winter oft, at eve resumes the breeze. --Thomson.
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. "On
the eve of death." --Keble.
Eve churr (Zo["o]l.), the European goatsucker or nightjar;
-- called also night churr, and churr owl.