mad

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mad / mad/ • adj. (mad·der , mad·dest ) mentally ill; insane: he felt as if he were going mad. ∎  (of a person, conduct, or an idea) extremely foolish or ill-advised: they were all mad to go believing such a cock-and-bull story. ∎  in a frenzied mental or physical state: she pictured loved ones mad with anxiety about her it was a mad dash to get ready. ∎ inf. enthusiastic about someone or something: I wasn't mad about mountain bikes | [in comb.] a sports-mad nation. ∎ inf. very angry: they were mad at each other. ∎  (of a dog) rabid. ∎ Brit., inf. very exciting.• v. (mad·ded / madəd/ , mad·ding ) [tr.] archaic make mad or insane.PHRASES: like mad inf. with great intensity, energy, or enthusiasm: I ran like mad. (as) mad as a hatter inf. completely crazy.

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