noun (n)

• a final climactic stage(noun.time)

  Synonym:
  culmination
  

  source: wordnet30
• apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth(noun.location)

  Antonym:
  perigee
  

  source: wordnet30
• That point in the orbit of the moon which is at the greatest distance from the earth.(noun)

  source: webster1913