For: Christmas
The noun christmas has 2 senses (first 2 from tagged texts)
1. Christmas, Christmastide, Christmastime, Yule, Yuletide, Noel -- (period extending from Dec. 24 to Jan. 6)
2. Christmas, Christmas Day, Xmas, Dec 25 -- (a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland)
The verb christmas has 1 sense (no senses from tagged texts)
1. christmas -- (spend Christmas; "We were christmassing in New York")
Source: Princeton University - Wordnet Dictionary