Christmas is a Christian holiday celebrating the birth of Jesus Christ.

Synonyms:
christmas day, christmastide, christmastime, dec 25, noel, xmas, yule, yuletide 

Contains:
boxing day 

Part of:
dec, december, jan, january 

More general:
legal holiday, national holiday, pass, season, spend 

Often used in the same context:
holiday, year, mas, santa, snow, holidays, tree, mass, presents, gift, winter,
gifts, miss, eve, banana, bells, merry, present, santa claus, business, cheer,
hanukkah, holly, list, birth, celebration, christmas tree, clause, dinner,
greetings, ornament, snowflake, candle, christ, claus, festive, flake, giving,
greeting, kisses, kwanzaa, seasons, shopping, toys, treat, turkey, who, wreath 

Appears in the definition of:
abies balsamea, advent, american mistletoe, atriplex hymenelytra, balm of gilead,
balsam fir, canada balsam, caroling, ceratopetalum gummiferum, christmas box,
christmas bush, christmas card, christmas eve, christmas gift, christmas present,
dec 24, desert holly, el nino, epiphany, epiphany of our lord, genus lycopodium,
january 6, kwanza, lord of misrule, lycopodium, mistletoe, nativity, old world
mistletoe, phoradendron flavescens, phoradendron serotinum, simnel, slate club,
three kings' day, trim, twelfth day, virgin birth, viscum album, wassail, woolly
adelgid, yule log

Merry is full of or showing high-spirited merriment. Offering fun and gaiety.
Activities that are enjoyable or amusing, affording satisfaction or pleasure.

"Have a merry Christmas"