astounding

adjective

as·​tound·​ing ə-ˈstau̇n-diŋ 

: causing astonishment or amazement

an astounding revelation

astoundingly

ə-ˈstau̇n-diŋ-lē 

adverb

Synonyms

• amazing
• astonishing
• blindsiding
• dumbfounding
• dumfounding
• eye-opening
• flabbergasting
• jarring
• jaw-dropping
• jolting
• shocking
• startling
• stunning
• stupefying
• surprising

Examples of astounding in a Sentence

He ate an astounding amount of food.

the astounding sight of their cat returning home after having been missing for two years

Recent Examples on the Web

In these tense, troubled times, the astounding success of this gritty bunch is a metaphor for values that matter: Hard work. —Sun Sentinel Editorial Board, Sun Sentinel, 18 June 2025

An astounding 99% have used a mobile banking app in the past month, and nearly half manage their finances solely via smartphone. —Monica Hovsepian, Forbes.com, 17 June 2025

There's a lot of really beautiful music, and George's voice of course is astounding. —David Chiu, People.com, 12 June 2025

What makes this Slovenian castle so special is its astounding location — Predjama is arrayed across a cave mouth beneath a natural rock arch on the side of a sheer cliff. —Cnn.com Wire Service, Mercury News, 10 June 2025

Word History

Etymology

from present participle of astound entry 1

First Known Use

1590, in the meaning defined above

Rhymes for astounding

• abounding
• compounding
• confounding
• expounding
• foregrounding
• impounding
• propounding
• rebounding
• resounding
• surrounding
• bounding
• founding