Definition of flabbergast in English:

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flabbergast

Pronunciation: /ˈflabərˌɡast/

verb

[with object] (usually as adjective flabbergasted) informal
Surprise (someone) greatly; astonish: this news has left me totally flabbergasted
More example sentences
  • Well, I'd just like to say that I'm completely flabbergasted and astounded.
  • Brian was flabbergasted, but not really surprised, not on a subconscious level.
  • He was flabbergasted at the total complexity of the question.

Origin

Late 18th century: of unknown origin.

For editors and proofreaders

Syllabification: flab·ber·gast

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