A wandering or roving around, especially in search of chivalrous adventure.

Straying from the proper course or standard, or outside established limits. / Roving around; wandering. / Prone to making errors; misbehaving.

A knight-errant.

(literary or archaic) A mission or quest. / A mundane mission of no great consequence, concerning household or business affairs (dropping items by, doing paperwork, going to a friend's house, etc.)

(transitive) To send someone on an errand. / (intransitive) To go on an errand.

(idiomatic) A foolish undertaking, especially one that is purposeless, fruitless, nonsensical, or certain to fail. / (idiomatic) Such an undertaking, assigned as a prank.

plural of errand

Third-person singular simple present indicative form of errand

the state of being in error; fallibility / holding the view that the Pope is not infallible

plural of knight-errant