Adjective

(en adjective)

Too implausible to be credible; beyond belief; unbelievable.

* 1980 September 16, (w), quoted in William A. Schwartz et al., The Nuclear Seduction: Why the Arms Race Doesn’t Matter—And What Does , University of California Press (1990, 1993), ISBN 0-520-06134-9, page 29:

I get lost in what is credible and not credible. This whole thing gets so incredible when you consider wiping out whole nations, it is difficult to establish credibility.

* 2009 , (Diarmaid MacCulloch), A History of Christianity , Penguin 2010, page 796:

He therefore found revealed religion incredible in a literal sense, and, as Bayle had done before him, he radically separated morality from the practice of organized religion.

Amazing; astonishing; awe-inspiring.

He was so wrapped up in watching the incredible special effects that he couldn't keep track of the story.

Marvelous; profoundly affecting; wonderful.

I had such an incredible slice of pizza last night that I simply can't think about anything else.

Adjective

(en adjective)

Incapable of being believed; incredible.

Inconceivable or unimaginable; extremely improbable in a way that goes against common sense.

Nothing is unthinkable , nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development -

* {{quote-news

, year=2011 , date=October 23 , author=Tom Fordyce , title=2011 Rugby World Cup final: New Zealand 8-7 France , work=BBC Sport citation , page= , passage=With 16 minutes left on the clock and the tension climbing through the roof, Trinh-Duc tried his luck with a penalty from just inside halfway only to push it wide, but the unthinkable now seemed a real possibility.}}