[kris-muh
s] 
| 1. | the annual festival of the Christian church commemorating the birth of Jesus: celebrated on December 25 and now generally observed as a legal holiday and an occasion for exchanging gifts. |
| 2. | Christmastime. |
| 3. | Christmastide. |
| Christ·mas (krĭs'məs) n.
[Middle English Cristemas, from Old English Crīstes mæsse, Christ's festival : Crīst, Christ; see Christ + mæsse, festival; see Mass.] Christ'mas·sy, Christ'mas·y adj. |
A festival commemorating the birth of Jesus, traditionally celebrated on December 25 by most Western Christian churches. Although dating to probably as early as a.d. 200, the feast of Christmas did not become widespread until the Middle Ages. Today, Christmas is largely secularized and dominated by gifts, decorated trees, and a jolly Santa Claus.