n. Knighthood; the medieval system of military privileges, with its peculiar honorary titles and aristocratic limitations of honorable position to the possessors of those titles, founded upon the several degrees of military service rendered on horseback. See knight.n. That which pertains to knighthood; the usages and customs pertaining to the order of knighthood; the ideal qualifications of a knight, collectively, as courtesy, generosity, valor, and dexterity in arms; the ideal of knighthood.n. A knightly adventure, exploit, or mode of action.n. An order or a body of knights; knights or warriors collectively; any company of illustrious warriors.n. In English law, a tenure of lands by knight's service—that is, by the condition of performing service on horseback, or of performing some noble or military service to the lord. See knight-service and tenure.