noun (n)

• period extending from Dec. 24 to Jan. 6(noun.time)

  Synonym:
  christmastide, christmastime, noel, yule, yuletide
  

  source: wordnet30
• a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland(noun.time)

  Synonym:
  christmas day, dec 25, xmas
  

  source: wordnet30
• 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)

  source: webster1913