Beauty, physical, intellectual, or moral; loveliness; commonly, easy elegance of manners; perfection of form.
An essential virtue not necessarily of knighthood, but of nobility. Remember that in the Middle Ages the question of nobility was two-fold; on one hand a man had to be born into nobility, because people believed that there was a strong heredity component to human behavior. Certain virtues were expected of members of the nobility or the aristocracy because they were different from the lesser folk. On of the virtues expected was grace, the quality that combined tact, courtesy, good judgment, and respect for others into a single ‘graceful' nature that was only possible with a mature, virtuous soul.