Guinevere, the wife of King Arthur; the most beautiful of women, conceived a guilty passion for Lancelot, one of Arthur's knights, and married Modred, her husband's nephew, in the latter's absence on an expedition against the Romans, on hearing of which he returned, met Modred on the field of battle, whom he slew, fell mortally wounded himself, while she escaped to a nunnery. Tennyson gives a different version in his "Idylls."