01 a. Resembling, characteristic of, or pertaining to, the devil; diabolical; wicked in the extreme.
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1.
Resembling, characteristic of, or pertaining to, the devil; diabolical; wicked in the extreme.“This wisdom descendeth not from above, but is earthly, sensual, devilish.” — James iii. 15.
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2.
Extreme; excessive.[Colloq.]
Syn.
Diabolical; infernal; hellish; satanic; wicked; malicious; detestable; destructive.