Knight-errantry n. : The character or actions of wandering knights; the practice of wandering in quest of adventures; chivalry; a quixotic or romantic adventure or scheme.

Example:


Taxonomy
knight-errant, knight, adventures, search, free encyclopedia, lord, Chinese knights-errant, wandering, Sir Gawain, Sir Bercilak, lion, cowboy, exploit, service, encounter, Russian knights, Chinese Knight Errant, Errant.

Defination from the web:
... more sublimated forms of knight-errantry, pure metaphysical idealism rather than romantic inspiration motivated the knight-errant (as in the case ... Such a knight might well be outside the structure of feudalism, wandering solely to perform noble exploits (and perhaps to find a lord to give ...