əˈstɒnɪʃɪŋ əˈstɑnɪʃɪŋ shocking with surprise and consternation the stupefying impact of the tragedy so surprisingly impressive as to stun or overwhelm such an enormous response was astonishing an astounding achievement the amount of money required was staggering suffered a staggering defeat the figure inside the boucle dress was stupefying making physically stupid or dull or insensible a stupefying blow to the head the stupefying effects of hemp