Try Our Apps
Dictionary.com

follow Dictionary.com

The Best Internet Slang

unbelievable

[uhn-bi-lee-vuh-buh l] /ˌʌn bɪˈli və bəl/
adjective
1.
too dubious or improbable to be believed:
an unbelievable excuse.
2.
so remarkable as to strain credulity; extraordinary:
the unbelievable fury of the storm; an unbelievable athlete.
Origin of unbelievable
1540-1550
1540-50; un-1 + believable
Related forms
unbelievably, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for unbelievably
Contemporary Examples
Historical Examples
  • The Earth, unbelievably bright, was beckoning them once more.

    The Finding of Haldgren Charles Willard Diffin
  • If he had been strangely slow he was now unbelievably swift.

    Tales of Fishes Zane Grey
  • The ground was unbelievably rough and the jolting intolerable.

    Sand Doom William Fitzgerald Jenkins
  • His great arms were unbelievably powerful, but I could feel them dwindling.

    Beyond the Vanishing Point Raymond King Cummings
  • The Wabbly was unbelievably impersonal and horrible in its progress.

    Morale Murray Leinster
British Dictionary definitions for unbelievably

unbelievably

/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

unbelievable

/ˌʌnbɪˈliːvəbəl/
adjective
1.
unable to be believed; incredible or astonishing
Derived Forms
unbelievability, unbelievableness, noun
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
Cite This Source
Word Origin and History for unbelievably

unbelievable

adj.

1540s, from un- (1) "not" + believable. Related: Unbelievably.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for unbelievable

Few English speakers likely know this word

Word Value for unbelievably

22
28
Scrabble Words With Friends

Nearby words for unbelievably