Dictionary.com
Thesaurus.com
Synonyms

unbelievably

British  
/ ˌʌnbɪˈliːvəblɪ /

adverb

  1. in a manner that is hard to believe; astonishingly

    it gets unbelievably hot

  2. (sentence modifier) it is hard to believe that; incredibly

    unbelievably, he remained utterly cheerful
"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

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.

A bonus point win in Ireland and no bonus point win for France in Paris and then, unbelievably, the Scots are the champions.

From BBC • Mar. 7, 2026

But that technology is unbelievably innovative, solid, and we are adopting it.

From The Wall Street Journal • Feb. 21, 2026

They were able to work their way through these unbelievably difficult investigations to bring leading military figures to justice, but also people underneath them.

From Slate • Feb. 17, 2026

"He said to me he slept unbelievably, so he is fit," said Guardiola of Haaland, who has netted 39 times for club and country this season.

From Barron's • Jan. 19, 2026

I began to feel unbelievably stupid and ungrateful for doing that to him—to us.

From "Red Kayak" by Priscilla Cummings

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.