The Collaborative International Dictionary of English v.0.48:

Eve \Eve\ ([=e]v), n. [See Even, n.]
   1. Evening. [Poetic]
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            Winter oft, at eve resumes the breeze. --Thomson.
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   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.
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   Eve churr (Zo["o]l.), the European goatsucker or nightjar;
      -- called also night churr, and churr owl.
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