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Meaning of knight-errant

knight-er•rant

Pronunciation: (nīt'er'unt), [key]
— pl. knights-er•rant.
  1. a wandering knight; a knight who traveled widely in search of adventures, to exhibit military skill, to engage in chivalric deeds, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.