a. [ For twelft, OE. twelfte, AS. twelfta. See Twelve. ]
n.
n. An ornamented cake distributed among friends or visitors on the festival of Twelfth-night. [ 1913 Webster ]
n. See Twelfthtide. [ 1913 Webster ]
n. The evening of Epiphany, or the twelfth day after Christmas, observed as a festival by various churches. [ 1913 Webster ]
n. (Physics) A unit for the measurement of small intervals of time, such that 10
n. The twelfth day after Christmas; Epiphany; -- called also