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Definition of flabbergast

flabbergast

/ˈflæb.ɚ.ɡæst/
flab · ber · gast
Adjective:flabbergasted
•
Past Simple:flabbergasted
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Past Participle:flabbergasted
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Present Participle:flabbergasting
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flabbergast Lexical Profile

flabbergast Game Scores & Validity

• verb

1

To surprise or astonish someone greatly, leaving them utterly speechless or overwhelmed.

Example

"The sudden announcement of the company's merger continued to flabbergast even the most seasoned industry analysts."

Synonyms
View all synonyms for flabbergast
Antonyms
View all antonyms for flabbergast

Word Nuance & Usage

Most commonly encountered in the passive voice or as the participial adjective "flabbergasted," and carries an informal, mildly humorous or emphatic register.

• Nearby Words

fjallfoss
fjord
flab
flabbergast
flabbergasted
flabbiness
flabby

Word Origin & Etymology

First recorded in the late 18th century as fashionable slang, likely formed as an expressive blend of "flabby" (or dialectal "flabber," meaning to flap) and "aghast."

Cite this Entry

Wordmom. (2026). Definition of Flabbergast. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/flabbergast
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