v.tr. (-ies, -ied) 1 make stupid or insensible (stupefied with drink). 2 stun with astonishment (the news was stupefying). stupefacient adj. & n. stupefaction n. stupefactive adj. stupefier n. stupefying adj. stupefyingly adv.
[ F stupéfier f. L stupefacere f. stupere be amazed ]