- a medieval knight wandering in search of adventures, esp. ones allowing him to redress wrongs or show his prowess
- a chivalrous or quixotic person
nounpl. knights-errant knights-errant
- A knight, often portrayed in medieval romances, who wanders in search of adventures to prove his chivalry.
- One given to adventurous or quixotic conduct.
(plural knights errant)
- Alternative form of knight-errant.