•(Arthurian legend) one of the knights of the Round Table; friend of King Arthur until (according to some versions of the legend) he became the lover of Arthur's wife Guinevere
From Middle English Launcelot, from Old French Lancelot, from Frankish *Lanzo, hypocoristic form of names beginning in *Land-, from Proto-Germanic *landą (“land”), and diminutive Old French endings -el and -ot. Related to Old English Landbeorht (modern English Lambert).