part of speech: adjective

inflections: crazier, craziest

definition 1: (informal) having a mental illness; insane.

  • The crazy person was being cared for by a doctor.

synonyms: insane

antonyms: sane

definition 2: not reasonable or practical; silly; foolish.

  • They had a crazy plan to win a million dollars.

synonyms: foolish, mad, silly

antonyms: sane

definition 3: very unpredictable or odd.

  • We have been having crazy weather, freezing cold one day and warm the next.

definition 4: (informal) having a strong liking (usually followed by “about”).

  • Jane is crazy about dancing.

synonyms: mad, passionate

phrase: like crazy

derivations: crazily (adv.), craziness (n.)