Christmas

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A Christian feast commemorating the birth of Jesus.
• noun December 25, the day on which this feast is observed as a public holiday in many countries.
• noun Christmastide.

from The Century Dictionary.

• noun The festival of the Christian church observed annually in memory of the birth of Christ.
• noun Christmas day, the 25th day of December.
• noun [lowercase] The holly, Ilex Aquifolium, from its use for decoration on Christmas day.
• noun A box of presents at Christmas.

from the GNU version of the Collaborative International Dictionary of English.

• noun An annual church festival (December 25) and in some States a legal holiday, in memory of the birth of Christ, often celebrated by a particular church service, and also by special gifts, greetings, and hospitality.
• noun A present or small gratuity given to young people and servants at Christmas; a Christmas gift.
• noun a carol sung at, or suitable for, Christmas.
• noun Same as Christmas.
• noun the evening before Christmas.
• noun (Bot.) an evergreen North American fern (Aspidium acrostichoides), which is much used for decoration in winter.
• noun the black hellebore, a poisonous plant of the buttercup family, which in Southern Europe often produces beautiful roselike flowers midwinter.
• noun a small evergreen tree, set up indoors, to be decorated with bonbons, presents, etc., and illuminated on Christmas eve.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun A widely celebrated festival commemorating the birth of Jesus Christ, incorporating various Christian, pre-Christian and secular customs.
• proper noun A personification of Christmas.
• noun Christmas Day, the day it is celebrated, 25 December, an English quarter day.
• noun Christmastide, the Twelve Days of Christmas, the season (traditionally from the 24th of December to the 6th of January) around the holiday.
• noun US, retailing The period from the Friday following Thanksgiving to Christmas Eve, busy with shopping and preparations for Christmas.
• noun marketing, retailing Christmas season, the end of the year period, busy with shopping and preparations for Christmas.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun period extending from Dec. 24 to Jan. 6
• noun a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland