Pertaining to the devil; partaking of the qualities of the devil; devilish; hence, infernal; Impious; atrocious; outrageously wicked: as, a diabolic plot; a diabolical temper.

Synonyms See list under devilish.

adjective. Pertaining to the devil; resembling, or appropriate, or appropriate to, the devil; befitting hell or satan; devilish; infernal; impious.

adjective. showing a wicked cunning or ingenuity.

adjective. extremely evil or cruel; atrocious; outrageously wicked.

adjective. Showing wickedness typical of a devil.

adjective. Extremely evil or cruel.

adjective. showing the cunning or ingenuity or wickedness typical of a devil

adjective. extremely evil or cruel; expressive of cruelty or befitting hell