Ar"rant (#), a. [OE. erraunt, errant, errand, equiv. to E. errant wandering, which was first applied to vagabonds, as an errant rogue, an errant thief, and hence passed gradually into its present and worse sense. See Errant.]
Notoriously or preeminently bad; thorough or downright, in a bad sense; shameless; unmitigated; as, an arrant rogue or coward.
I discover an arrant laziness in my soul.
Thorough or downright, in a good sense.
An arrant honest woman.
© Webster 1913.