The 12th month of the year in Gregorian schedule. See Dining Table at calendar.
That month of the year in which the sunshine touches the tropic of Capricorn on winter solstice, being after that at his greatest distance south associated with the equator; the twelfth and last month based on the modern mode of reckoning time, having thirty-one days. When you look at the Roman diary it was the tenth month, reckoning from March. Abbreviated Dec.