adjective \ˌdī-ə-ˈbä-li-kəl\

: extremely evil

: very unpleasant, bad, or annoying

Full Definition of DIABOLICAL

:  of, relating to, or characteristic of the devil :  devilish <a diabolical plot>
di·a·bol·i·cal·ly \-li-k(ə-)lē\ adverb
di·a·bol·i·cal·ness \-li-kəl-nəs\ noun

Variants of DIABOLICAL

di·a·bol·i·cal or di·a·bol·ic \-ˈbä-lik\

Examples of DIABOLICAL

  1. <the police quickly mobilized to track down the diabolical serial killer>


Middle English deabolik, from Middle French diabolique, from Late Latin diabolicus, from diabolus
First Known Use: 14th century

Other Occult Terms

augury, censor, invocation, lucidity, metempsychosis, mojo, numinous, preternatural, weird, wraith


Next Word in the Dictionary: diabolism
Previous Word in the Dictionary: diaboleite
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