definition
Utter; complete (with a negative sense).
definition
Straying from the proper course or standard, or outside established limits.
definition
Wandering; roving around.
definition
Prone to making errors; misbehaved.
example
We ran down the street in pursuit of the errant dog.
definition
Utter, complete (negative); arrant.
I have never heard more arrant nonsense in my life.
He was only saved by his intellect and his fine nature from turning out an arrant prig.
Swift, who was intimate with him, speaks of him as "an arrant knave"; but the dean may have been disappointed at being unmentioned in Rivers's will, for he made a fierce comment on the earl's bequests to his mistresses and his neglect of his friends.