- December, Dec - the last (12th) month of the year
--1 is a kind of Gregorian calendar month
--1 is a part of Gregorian calendar, New Style calendar; winter, wintertime
--1 has parts:New Year's Eve, December 31; Christmas, Christmas Day, Xmas, Dec 25; Christmas, Christmastide, Christmastime, Yule, Yuletide, Noel; mid-December