Webster’s Revised Unabridged Dictionary · 1913
Stunning
Stun′ning (·nĭng), a. 1. Overpowering consciousness; overpowering the senses; especially, overpowering the sense of hearing; confounding with noise.
2. Striking or overpowering with astonishment, especially on account of excellence; as, stunning poetry. [Slang] C. Kingsley. — Stun′ning·ly, adv. [Slang]