1. a medieval knight who searches for adventure to prove his chivalry
2. someone with a quixotic spirit
► uses
Uses:
“A knight arriant is a rale gintleman,” says he; “going round the world for sport, with a soord by his side, takin’ whatever he plazes for himself; and that’s a knight arriant,” says he.
Humours of Irish Life: Samuel Lover. The Little Weaver of Duleek Gate.
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"And how long, clown, have you made similar reflections," said the marquis, looking witheringly at the barber. "After lending aid in all my intrigues, after leading me to commit actions which, but for you, I should never have thought of, should you allow yourself to control my morals and enact the knight errant of the beauties I deign to distinguish."
Charles Paul de Kock. The Barber of Paris
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The tidal current runs to and fro in its unceasing service, crowded with memories of men and ships it had borne to the rest of home or to the battles of the sea. It had known and served all the men of whom the nation is proud, from Sir Francis Drake to Sir John Franklin, knights all, titled and untitled—the great knights-errant of the sea.
Joseph Conrad. The Heart of Darkness
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[Don Quixote] hit upon the strangest notion that ever madman in this world hit upon, and that was that he fancied it was right and requisite, as well for the support of his own honour as for the service of his country, that he should make a knight-errant of himself, roaming the world over in full armour and on horseback in quest of adventures, and putting in practice himself all that he had read of as being the usual practices of knights-errant; righting every kind of wrong, and exposing himself to peril and danger from which, in the issue, he was to reap eternal renown and fame.
Miguel de Cervantes. Don Quixote
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Doll Tearsheet: I’ll tell you what, you thin man in a censer, I will have you as soundly swing’d for this—you blue-bottle rogue, you filthy famish’d correctioner, if you be not swing’d, I’ll forswear half-kirtles.
Beadle: Come, come, you she knight-arrant, come.
William Shakespeare. The Second Part of Henry the Forth (1598)