knight

ot noun

1. (by extension) An armored and mounted warrior of the Middle Ages. King Arthur and the Knights of the Round Table
2. A young servant or follower; a trained military attendant in service of a lord.
3. A minor nobleman with an honourable military rank who had served as a page and squire.
4. (modern) A person on whom a knighthood has been conferred by a monarch.

fe’l verb

1. To confer knighthood upon. The king knighted the young squire.
2. To promote (a pawn) to a knight.