- to make speechless with amazement; astonish.
Also dumb·found·er, dum·found·er.
Origin of dumbfound
SynonymsSee more synonyms for on Thesaurus.com
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for dumbfound
- (tr) to strike dumb with astonishment; amaze
C17: from dumb + (con) found
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 dumbfound
Online Etymology Dictionary, © 2010 Douglas Harper