(a) The name of an early Italian martyr and saint; seinte ~; dai of seinte ~, seinte valentines dai, February 14, the feast day of this saint, traditionally associated with the selection of a mate, lover, special friend, etc.; also as part of book title [1st quot.]; (b) a mate, sweetheart, one’s beloved; a beloved friend, benefactor, or patron; also used fig. of God, Christ, or a saint; (c) as surname; also as given name [last quot.].