n. 1. One who, or that which, stuns. [ 1913 Webster ]

2. Something striking or amazing in quality; something of extraordinary excellence. [ Slang ] Thackeray. [ 1913 Webster ]

a. 1. Overpowering consciousness; overpowering the senses; especially, overpowering the sense of hearing; confounding with noise. [ 1913 Webster ]

2. Striking or overpowering with astonishment, especially on account of excellence; as, stunning poetry. [ Slang ] C. Kingsley. -- Stun"ning*ly, adv. [Slang] [1913 Webster]