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From Middle English declinacioun, borrowed from Middle French declination, from Latin declinatio. Doublet of declension


  • (UK) IPA(key): /ˌdɛklɪˈneɪʃən/
    • (file)
  • Rhymes: -eɪʃən


declination (countable and uncountable, plural declinations)

  1. At a given point, the angle between magnetic north and true north.
    Synonym: magnetic declination
  2. At a given point, the angle between the line connecting this point with the geographical center of the earth and the equatorial plane.
    Antonym: right ascension
  3. A refusal.
    • 1746, Arthur Collins, Letters And Memorials Of State In the Reigns of Queen Mary
      the queen's declination from marriage
  4. (grammar, obsolete) Declension.
  5. (archaic) The act or state of bending downward; inclination.
    declination of the head
  6. (archaic) The act or state of falling off or declining from excellence or perfection; deterioration; decay; decline.
  7. (archaic) Deviation.
    • April 4, 1692, Richard Bentley, A Confutation of Atheism
      this declination of atoms in their descent
    • November 2, 1690, Robert South, Sinners Inexcusable from Natural Religion Only
      every violation of and declination from the rules

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