Definitionen
1.NounA young servant or follower; a trained military attendant in service of a lord.
2.NounA minor nobleman with an honourable military rank who had served as a page and squire.
3.NounAn armored and mounted warrior of the Middle Ages."King Arthur and the Knights of the Round Table"
4.NounA person obliged to provide knight service in exchange for maintenance of an estate held in knight's fee.
5.NounA person on whom a knighthood has been conferred by a monarch.
6.NounA brave, chivalrous and honorable man devoted to a noble cause or love interest.
7.NounA chess piece, often in the shape of a horse's head, that is moved two squares in one direction and one at right angles to that direction in a single move, leaping over any intervening pieces.
8.NounA playing card bearing the figure of a knight; the knave or jack.
9.Noun(Can we verify this sense?) Any of various nymphalid butterflies of the genus Ypthima.
10.NounAny mushroom belonging to genus Tricholoma.
11.NounA species of nymphalid butterfly, Lebadea martha, found in tropical and subtropical Asia.
12.VerbTo confer knighthood upon."The king knighted the young squire."
13.VerbTo promote (a pawn) to a knight.