flabbergasted

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈflæbərgɑːstɪd/


WordReference Random House Learner's Dictionary of American English © 2026
flab•ber•gast /ˈflæbɚˌgæst/USA pronunciation   v. [~ + object]
  1. to overcome with surprise and bewilderment;
    astound:The news of his promotion flabbergasted me.

WordReference Random House Unabridged Dictionary of American English © 2026
flab•ber•gast  (flab′ər gast′),USA pronunciation v.t. 
  1. to overcome with surprise and bewilderment;
    astound.
  • variant of flabagast (perh. flabb(y) + aghast) 1765–75
flab′ber•gast′er, n. 
    amaze, astonish, stagger, nonplus, confound; perplex, confuse, mystify.
Collins Concise English Dictionary © HarperCollins Publishers::
flabbergast /ˈflæbəˌɡɑːst/ vb (transitive)
  1. informal to overcome with astonishment; amaze utterly; astound
Etymology: 18th Century: of uncertain origin
'flabbergasted' also found in these entries (note: many are not synonyms or translations):
open-mouthed - thunderstruck

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