mad

mad [mad]

adj.

madder, maddest [ME madd, aphetic < OE gemæd, pp. of (ge)mædan, to make mad, akin to Goth gamaiths, crippled, OS gimēd, foolish < IE * mait- < base * mai-, to hew, cut off > Goth maitan, to hew, Gr mitylos, dehorned]

1. mentally ill; insane

2. wildly excited or disorderly; frenzied; frantic [mad with fear]

3. showing or resulting from lack of reason; foolish and rash; unwise [a mad scheme]

4. blindly and foolishly enthusiastic or fond; infatuated [to be mad about clothes]

5. wildly amusing; hilarious [a mad comedy]

6. having rabies [a mad dog]

7.

a) angry or provoked: often with at

b) showing or expressing anger

vt., vi.

madded, madding

Archaic to madden

n.

an angry or sullen mood or fit

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have a mad on

Informal to be angry

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mad as a hatter or mad as a March hare

completely crazy