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verb (used with object)
  1. to overwhelm with amazement; astonish greatly; shock with wonder or surprise.
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  1. Archaic. astonished; astounded.
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Origin of astound

1275–1325; Middle English astoun(e)d, past participle of astonen, variant of astonyen to astonish
Related formsas·tound·ment, noun


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1. See surprise.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

dumbfound, bewilder, overwhelm, stun, shock, confuse, stagger, confound, startle, astonish, stupefy, surprise, flabbergast, daze

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British Dictionary definitions for astounded


  1. (tr) to overwhelm with amazement and wonder; bewilder
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Word Origin

C17: from astoned amazed, from Old French estoné, from estoner to astonish
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for astounded



mid-15c., from Middle English astouned, astoned (c.1300), past participle of astonen, astonien "to stun" (see astonish), with more of the original sense of Vulgar Latin *extonare. Related: Astounded; astounding.

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Online Etymology Dictionary, © 2010 Douglas Harper