In English, "diabolical" has many nuances of meaning. It can describe the devil himself (as in "my diabolical visitor") or anything related to or characteristic of him in appearance, behavior, or …

DIABOLICAL definition: having the qualities of a devil; devilish; fiendish; outrageously wicked. See examples of diabolical used in a sentence.

Define diabolical. diabolical synonyms, diabolical pronunciation, diabolical translation, English dictionary definition of diabolical. also di·a·bol·ic adj. 1. Of, concerning, or characteristic of the …

Morally wrong and evil (Definition of diabolical from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

If you describe something as diabolical, you are emphasizing that it is very bad, extreme, or unpleasant.

Factsheet What does the word diabolical mean? There are six meanings listed in OED's entry for the word diabolical. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Jul 22, 2025 · (slang) Crazy, wild (sometimes especially due to being unexpected or surprising).