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1634,[1] from Christianity, replacing Christ with the abbreviation Xt (from Ancient Greek Χ (Kh, the letter chi), the first letter of Χριστός (Khristós, Christ) + t, the last letter of "Christ"). Compare the more common Xmas.


Xtianity (uncountable)

  1. Alternative form of Xianity (abbreviation of Christianity)
    • 1950 December 14, C. S. Lewis, Letter to Sheldon Vanauken[1]:
      I believe Buddhism to be a simplification of Hinduism and Islam to be a simplification of Xtianity.

Usage notes[edit]

As with Xmas and Xianity, as of the late 20th century this term may be considered informal and potentially disrespectful, though it was traditionally an unobjectionable scribal abbreviation.


  1. ^ Oxford English Dictionary, 1884–1928, and First Supplement, 1933.