A knight in a medieval romance who wanders in search of adventure and opportunities to prove his chivalry. / A person who displays an adventurous or a quixotic spirit.

(historical) A chiefly military order of medieval knights that existed for nearly two centuries during the Crusades

plural of white knight

plural of ale-knight

(fiction) A villain or evil character who masks their identity and that of their liege by not displaying heraldry.

(obsolete) A drinking companion.

plural of black knight

(obsolete, idiomatic) A known perjurer; a professional false witness.

plural of knight-erratic

Alternative form of knight-errant