0 in a way that makes someone unable to think clearly, usually because of being extremely tired or bored, or having taken drugs: --
She is stupefyingly bored by many aspects of motherhood.
1 in a very surprising or shocking way: --
The extent to which some persons can go on reading without having any clear idea of what they read is stupefyingly amazing!
The mighty arms spread wide as the beast plunged, stupefyingly quick for all his vast bulk and stunted legs.
The event hosts a mix of amateurs and professionals and is stupefyingly expensive for either.
Stupefyingly inept management led to the company's collapse.
Papers seem seem almost stupefyingly oblivious to the fact that they aren't in the breaking news business anymore.
The island a place of leisure, paralysingly perfect, stupefyingly sensuous.