Definition of "madcap" in English

noun

1. A person who acts in a capricious, impulsive, or reckless manner.

   • Near-synonyms: mad lad, madlad

2. (South Asia) A very foolish or irresponsible person; a fool, an idiot.

3. (obsolete, rare) An insane person; a lunatic.

adjective

1. Capricious, impulsive, or reckless; also, bizarre, crazy, zany; or foolish, idiotic.

   • a madcap activity    a madcap idea    a madcap plan
   • The film featured a madcap car chase that went right through a crowded café.