from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Christmas.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • proper n. Abbreviation of Christmas.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland


From X, the Greek letter chi, first letter of Greek Khrīstos, Christ; see Christ.
(American Heritage® Dictionary of the English Language, Fourth Edition)
1755, preceded by earlier forms such as X'temmas (1551) and Old English Χp̃es mæssa (1100), from Christmas, replacing Christ by abbreviation X, from Ancient Greek Χ (Ch, "(letter chi)"), from Χριστός (Christós, "Christ"). Surface analysis X (“Christ”) +‎ -mas (“holiday”). In popular use since late 19th century. See Wikipedia for more information. (Wiktionary)



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