Definition of "astound"

These thoughts may startle well, but not astound / The vertuous mind […]

1637, John Milton, Comus, London: Humphrey Robinson, p. 8

The yell which Isaac raised at this unfeeling communication made the very vault to ring, and astounded the two Saracens so much that they let go their hold of the Jew.

1820, Walter Scott, chapter 22, in Ivanhoe‎

The vices of the poor sometimes astound us here; but when the secrets of all hearts shall be made known, their virtues will astound us in far greater degree. Of this I am certain.

1848, Elizabeth Gaskell, chapter 6, in Mary Barton‎

A young man had strung a wire between the towers of Notre-Dame Cathedral and walked and juggled and danced on it for three hours, astounding the crowds of people below.

1982, Paul Auster, “On the High Wire” in The Art of Hunger, Los Angeles: Sun & Moon Press, 1992, p. 240

[…] his hollow eyneLookt deadly dull, and stared as astound;

1590, Edmund Spenser, “Book I, Canto IX”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, page 129

For some Moments the Esquire stood astound, he rubb’d his Eyes, look’d on his Sister, stared at the Maid:

1760, George Alexander Stevens, chapter 2, in The History of Tom Fool‎, volume 2, London: T. Waller, page 9

Thus Ellen, dizzy and astound,As sudden ruin yawned around,By crossing terrors wildly tossed,Still for the Douglas fearing most,Could scarce the desperate thought withstand,To buy his safety with her hand.

1810, Walter Scott, “Canto II. The Island.”, in The Lady of the Lake; […], Edinburgh: […] [James Ballantyne and Co.] for John Ballantyne and Co.; London: Longman, Hurst, Rees, and Orme, and William Miller, stanza XXXI, page 36