ChristmasChristmasChristmasesnounthe period of time around and including 25 December, when Christians remember the birth of Christ: Merry Christmas!Where are you spending Christmas this year?cultureChristmas is a very important festival in Britain and the US. The day before Christmas Day is called Christmas Eve, and the day after is called Boxing Day. Many children believe that Father Christmas (also called Santa Claus) visits them at Christmas to bring presents. People send Christmas cards and give presents to their friends and family. Many people go to church at Christmas and sing carols. We put special trees (called Christmas trees) in our homes and decorate them with coloured lights and other pretty things. On Christmas Day we eat Christmas dinner, a special meal with roast turkey (= a large bird) and Christmas pudding (= a kind of cake made with dried fruit). Christmas is sometimes written informally as Xmas.