zenith

  1. Noun.  (astronomy) The point in the sky vertically above a given position or observer; the point in the celestial sphere opposite the nadir.
  2. Noun.  (astronomy) The highest point in the sky reached by a celestial body.
  3. Noun.  Highest point or state; peak.

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This entry was last updated on RefTopia from its source on 3/20/2012.