Vāin'ly, adv.

adv. 1. In a vain manner; without effect; to no purpose; ineffectually; in vain. In weak complaints you vainly waste your breath. Dryden. 2. With vanity; boastingly; with vaunting; proudly; arrogantly. Humility teaches us not to think vainly nor vauntingly of ourselves. Delany. 3. Idly; foolishly. “Nor vainly hope to be invulnerable.” Milton.