diabolical adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of diabolical adjective from the Oxford Advanced American Dictionary

diabolical

adjective

NAmE//ˌdaɪəˈbɑlɪkl//

1(less frequent diabolic

NAmE//ˌdaɪəˈbɑlɪk//

) morally bad and evil; like a devil

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2(informal) extremely bad or annoying synonym terrible The traffic was diabolical.

diabolically

NAmE//ˌdaɪəˈbɑlɪkli//

adverbSee diabolical in the Oxford Advanced Learner's Dictionary

Check pronunciation: diabolical