1. To stun; to render senseless, as by a blow. Enough, captain; you have astonished him. [Fluellen had struck Pistol] (Shak) The very cramp-fish [i. E, torpedo] . . . Being herself not benumbed, is able to astonish others. (Holland)
2. To strike with sudden fear, terror, or wonder; to amaze; to surprise greatly, as with something unaccountable; to confound with some sudden emotion or passion. Musidorus . . . Had his wits astonished with sorrow. (Sidney) I, Daniel . . . Was astonished at the vision. (dan. Viii. 27)
Synonym: to amaze, astound, overwhelm, surprise.