- thanksgiving [thaŋks΄giv′iŋ]n.1.a) the act of giving thanksb) an expression of this; esp., a formal, often public, expression of thanks to God in the form of a prayer, etc.☆ 2. [T-]a) an annual U.S. holiday observed on the fourth Thursday of November as a day of giving thanks and feasting: it commemorates the Pilgrims' celebration of the good harvest of 1621b) a similar Canadian holiday on the second Monday of October: in full Thanksgiving Day
English World dictionary. V. Neufeldt. 2014.