Dictionary.com
Thesaurus.com
Synonyms

aghast

American  
[uh-gast, uh-gahst] / əˈgæst, əˈgɑst /

adjective

  1. struck with overwhelming shock or amazement; filled with sudden fright or horror.

    They stood aghast at the sight of the plane crashing.


aghast British  
/ əˈɡɑːst /

adjective

  1. (postpositive) overcome with amazement or horror

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of aghast

1225–75; Middle English agast frightened, past participle of agasten, equivalent to a- a- 3 + gasten, Old English gǣstan to frighten, earlier *gāstjan < Germanic causative *gaistjan; see ghost

Explanation

Would you be aghast, or shocked, to find out that your friends believe in ghosts, or would you share their frightened, or aghast, looks when a floating white being hovers over the campfire? Aghast comes from Old English gasten, "frighten," which comes in turn from gāst, "ghost." If you've seen a look of absolute shock or terror on someone's face — like when your mom (or dad) sees a mouse — you can describe the look with the adjective aghast. If someone says "You should have seen the look on your face!" after sneaking up on you, you probably looked aghast yourself. "Boo!"

Keep Reading on Vocabulary.com

Vocabulary lists containing aghast

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Even the conservative editorial board at the Wall Street Journal seems aghast.

From MarketWatch Jul. 2, 2026

During oral argument in that case, Justice Antonin Scalia was aghast that anyone would think public school students have a right to advocate for legal marijuana.

From Slate Jun. 18, 2026

Lander was aghast and said that wasn’t his intention.

From The Wall Street Journal Jun. 8, 2026

People watching stars head from the Carlyle to the Met Gala were aghast when a ‘furious’ woman tried to enter the hotel.

From Los Angeles Times May 6, 2026

He stared at it, aghast, unable to take in what he was seeing...the wand that had survived so much...

From "Harry Potter and the Deathly Hallows" by J.K. Rowling

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training