Xmas
Pronunciation
Pronounced either as Christmas or as X+-mas:- enPR: /krÄs'mÉ™s/, IPA: /ˈkrɪs.mÉ™s/, /ˈɛks.mÉ™s/
Alternative forms
Origin
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 ΧÏιστός (Christós, "Christ"). Surface analysis X("Christ") + -mas("holiday"). In popular use since late 19th century. See Xmas for more information.
Usage notes
Discouraged in formal usage, and as of late 20th century considered disrespectful by some Christians, due to the absence of the word Christ.
See for further discussion.