dead wrong

adj

adj

Etymology From dead being used as an intensifier.

Utterly wrong.

He believed, against all experience, that the world was fundamentally understandable, and that if he could only equip himself with the right mental toolbox he could take the back off and see how it worked. He was, of course, dead wrong.1986, Terry Pratchett, The Light Fantastic, published 2022, page 130:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.