adj, verb ·Rare ·Advanced level

Definitions

Verb

1. 1
   present participle and gerund of flabbergast form-of, gerund, participle, present

Adjective

1. 1
   Overwhelming in a bewildering way; amazing, confounding, stunning, especially in a ludicrous manner.

Synonyms

All synonyms

bewilderingconfusingperplexingprodigioustremendous

Antonyms

All antonyms

clear

Etymology

From flabbergast + -ing.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.