Webster's Revised Unabridged Dictionary · 1913

Errant

Errant , adjective

[French errant, p. pr. from Old French errer to travel, Late Latin iterare, from Latin iter journey; confused somewhat with Latin errare to err. See Eyre, and compare Arrant, Itinerant.]

1.
Wandering; deviating from an appointed course, or from a direct path; roving.
Seven planets or errant stars in the lower orbs of heaven. — Sir T. Browne
2.
Notorious; notoriously bad; downright; arrant.
Would make me an errant fool. — B. Jonson
3.
(Eng. Law) Journeying; itinerant; -- formerly applied to judges who went on circuit and to bailiffs at large. — Mozley & W

Errant , noun

One who wanders about. [Obsolete] — Fuller