Meaning & Definition of Diabolical in English

1. Showing the cunning or ingenuity or wickedness typical of a devil

• "Devilish schemes"

• "The cold calculation and diabolic art of some statesmen"

• "The diabolical expression on his face"

• "A mephistophelian glint in his eye"

2. Extremely evil or cruel

• Expressive of cruelty or befitting hell

• "Something demonic in him--something that could be cruel"

• "Fires lit up a diabolic scene"

• "Diabolical sorcerers under the influence of devils"

• "A fiendish despot"

• "Hellish torture"

• "Infernal instruments of war"

• "Satanic cruelty"

• "Unholy grimaces"