what does diabolical mean
The definition of diabolical is something devilish or cunning in an evil way. A devilish and cunning plan to take over the world is an example of a diabolical plan. also diÂ·aÂ·bolÂ·ic. adjective. 1  Of, concerning, or characteristic of the devil; satanic.  Appropriate to a devil, especially in degree of wickedness or cruelty.