lancelot definition
Lancelot. Sir Lancelot du Lac was one of the Knights of the Round Table in the Arthurian legend. He was the most trusted of King Arthur's knights and played a part in many of Arthur's victories.Lancelot is best known for his love affair with Arthur's wife Guinevere and the role he played in the search for the Holy Grail.e was the most trusted of King Arthur's knights and played a part in many of Arthur's victories. Lancelot is best known for his love affair with Arthur's wife Guinevere and the role he played in the search for the Holy Grail.