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

On Tuesday, Germany coach Julian Nagelsmann backed Ter Stegen after the "unbelievably cruel" injury.

From Barron's • Feb. 4, 2026

This worked unbelievably well for a while, to the point that its stock was trading for about twice the value of its Bitcoin despite the company’s barely having another business.

From Slate • Feb. 3, 2026

The room was unbelievably loud, roaring with the sounds of his classmates and all their screaming and yelling and fighting and laughing.

From "A Monster Calls" by Patrick Ness

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.