—adj. (madder, maddest)
1 insane; having a disordered mind.
2 (of a person, conduct, or an idea) wildly foolish.
3 (often foll. by about, on) wildly excited or infatuated (mad about football; is chess-mad).
4 colloq. angry.
5 (of an animal) rabid.
6 wildly light-hearted.
—v. (madded, madding)
1 tr. US make angry.
2 intr. archaic be mad; act madly (the madding crowd).
Phrases and idioms:
like mad colloq. with great energy, intensity, or enthusiasm. mad keen colloq. extremely eager.
Derivatives:
madness n.
Etymology: OE gemaeligded part. form f. gemad mad
Useful english dictionary. 2012.