Definition of "astounded"

[…] now they lyeGroveling and prostrate on yon Lake of Fire,As we erewhile, astounded and amaz’d,No wonder, fall’n such a pernicious highth.

1667, John Milton, “Book I”, in Paradise Lost. […], London: […] [Samuel Simmons], […]; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, lines 279-282

[…] wrapt in SuspenseAnd Fear I stood, yet knew not what I fear’d;When straight to my appall’d, astounded SenseA Man of noble Port and Mien appear’d.

1774, Thomas Hull, Richard Plantagenet: A Legendary Tale‎, London: J. Bell, page 13

Had a thunderbolt fallen at my feet I could not have been more thoroughly astounded […]

1844, Edgar Allan Poe, “The Spectacles” in The Works of Edgar Allan Poe, New York: W.J. Widdleton, Volume 2, p. 327

The housewife was to take a sip of the real juice, watch the interviewer mix the Instant right before her astounded eyes, and then try the result, impressed, possibly, by its quickness and ease […]

1969, Margaret Atwood, chapter 19, in The Edible Woman‎, New York: Popular Library, published 1976, page 168