Christmas

名词 christmas:

1. period extending from Dec. 24 to Jan. 6
   同义词：Christmastide, Christmastime, Yule, Yuletide, Noel
2. a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland
   同义词：Christmas Day, Xmas, Dec 25

动词 christmas:

1. spend Christmas

1. Parliament won't be in session again until after Christmas.
   国会将等到圣诞节后才再进入会期。
2. They decorated the Christmas tree with tinsel.
   他们用亮金属片装饰圣诞树。
3. Christmas is a time of mirth, especially for children.
   圣诞节是个快乐的日子，尤其是对孩子们。
4. We went to the church to celebrate Christmas Eve.
   我们去教堂庆祝圣诞前夕。
5. Christmas revels with feasting and dancing were common in England.
   圣诞节盛宴歌舞的狂欢在英国是很常见的。
6. Christmas commemorates the birth of Christ.
   圣诞节是为了纪念耶酥的诞生。
7. We usually sing carols at Christmas.
   圣诞节时，我们一般会唱颂歌。
8. Merry Christmas!
   圣诞快乐！

Christ.mas

n.（名词）
A Christian feast commemorating the birth of Jesus.
圣诞节：纪念耶稣诞生的基督教节日
December 25, the day on which this feast is celebrated.
十二月二十五日，庆祝圣诞节的日子
Christmastide.
圣诞节节期

来源：
Middle English Cristemas
中古英语 Cristemas
from Old English Crostes môsse [Christ`s festival]
源自 古英语 Crostes môsse [基督的节日]
Crost [Christ] * see Christ
Crost [基督] *参见 Christ
môsse [festival] * see Mass
môsse [节日] *参见 Mass

【引伸】
Christ.massy 或
Christ.masy
adj.（形容词）