crazyPronunciation: /ˈkreɪzi/ informalTranslate crazy | into French | into German | into Italian | into Spanish Definition of crazy adjective (crazier, craziest) 1mad, especially as manifested in wild or aggressive behaviour:Stella went crazy and assaulted a visitor a crazy look extremely angry:the noise was driving me crazy foolish:it was crazy to hope that good might come out of this mess 2extremely enthusiastic:I’m crazy about Cindy [in combination]:a football-crazy bunch of boys 3(of an angle) appearing absurdly out of place or unlikely:the monument leant at a crazy angle archaic (of a ship or building) full of cracks or flaws; unsound. noun (plural crazies) chiefly North American a mad person: keep that crazy away from mePhrases like crazy to a great degree; very intensely:we are just working like crazy in a very fast or unrestrained way:another driver, who was driving like crazy, ran him off the roadDerivatives crazily adverb craziness noun crazy in other Oxford dictionaries Definition of crazy in the US English dictionary