flabbergast

[ flab-er-gast ]
/ ˈflæb ərˌgæst /
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verb (used with object)

to overcome with surprise and bewilderment; astound.

Origin of flabbergast

1765–75; variant of flabagast (perhaps flabb(y) + aghast)

SYNONYMS FOR flabbergast

Related forms

flab·ber·gast·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for flabbergaster

flabbergast

/ (ˈflæbəˌɡɑːst) /

verb (tr)

informal to overcome with astonishment; amaze utterly; astound

Word Origin for flabbergast

C18: of uncertain origin
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