mad

adj

1. (British)Insane; crazy, mentally deranged.

   “You want to spend a thousand pounds on a pair of shoes? Are you mad?”

   “He's got this mad idea that he's irresistible to women.”

   “I have heard my grandsire say full oft, / Extremity of griefs would make men mad.”

   “Sometimes, I feel sure he is as mad as a hatter; and then, just as he is at his maddest, I find there is method in his madness.”

   “Dr. Manuel: Is it madness to see the future? To see the destruction rushing towards us? To understand there is no escape? No hope? No, I am not mad. I'm the only sane one left!”

2. (US, informal)Angry, annoyed.

   “Are you mad at me?”

   “And I punished them oft in euery Synagogue, and compelled them to blaspheme, and being exceedingly mad against them, I persecuted them euen vnto strange cities.”

   “She was so mad she wouldn't speak to me for quite a spell, but at last I coaxed her into going up to Miss Emmeline's room and fetching down a tintype of the missing Deacon man.”

3. (informal)Used litotically to indicate satisfaction or approval.

   “Wow, you really made this pie from scratch? I'm not mad at it.”

   “I'm not mad at this little house, though.”

   “But I mean, once the flow was there, nobody was mad at it.”

4. (Ireland, UK, informal)Bizarre; incredible.

   “It's mad that I got that job back a day after being fired.”

5. Wildly confused or excited.

   “to be mad with terror, lust, or hatred”

   “It is the land of graven images, and they are mad upon their idols.”

   “My brother, quiet as a cat, seems perfectly contented with the internal feelings of his felicity. The Marquis, mad as a kitten, is all in motion to express it, from tongue to heel.”

   “[…] at all, just a vast space of desert out in the saltlands of Nevada. It's serious dressing up, the maddest entertainment, craziest art, and at the end there's the burning of a huge effigy, stuffed with pyrotechnics 287.”

6. Extremely foolish or unwise; irrational; imprudent.
7. (colloquial, usually)Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for.

   “Aren't you just mad for that red dress?”

   “My wife is soccer-mad.”

   “Glenereegan is to be sold to the highest bidder to-day.[…]I'm tould - It's Pether Byrne that dhrives Bianconi's car that tould me - that a smalpeen of a Dublin attorney is mad for it.”

8. Abnormally ferocious or furious; or, rabid, affected with rabies.

   “a mad dog”

9. (New-York, slang)Intensifier, signifying abundance or high quality of a thing; very, much or many.

   “I gotta give you mad props for scoring us those tickets. Their lead guitarist has mad skills. There are always mad girls at those parties.”

10. Having impaired polarity.

adv

1. (Ireland, New-York, UK, dialectal, not-comparable, slang)Intensifier; to a large degree; extremely; exceedingly; very; unbelievably.

   “He was driving mad slow.”

   “It's mad hot today.”

   “He seems mad keen on her.”

verb

1. (intransitive, obsolete)To be or become mad.

   “The imperial Elizabetta gazed with surprise at the youthful and unpretending appearance of the little being that had set the world madding.”

2. (Jamaica, US, colloquial)To madden, to anger, to frustrate.

   “This musick mads me, let it sound no more.”

   “He that mads others, if he were so humoured, would be as mad himself, as much grieved and tormented […].”

   “Carolina! Whine your body gyal! Make Dem know say you have it fi mad dem”

noun

1. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of mutual assured destruction or mutually assured destruction.

   “[T]he only bombs anyone dropped—on Hiroshima and Nagasaki—were Uncle Sam's message to non-nuclear Japan. MAD was salvation. MAD was security. MAD was the way of life most of us grew up with, the prevailing logic of uneasy peace. So whatever became of our mad, mad world?”

   “But the American government worries that MAD-style deterrence will no longer work. Terrorists, for example, might not care about the threat of destruction.”

2. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of magnetic anomaly detector.
3. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of mothers against decapentaplegic.
4. (abbreviation, acronym, alt-of, countable, uncountable)Acronym of magnetically-arrested disc, a type of black hole accretion disc).
5. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of mandibular advancement device.
6. (abbreviation, acronym, alt-of, uncountable)Acronym of mothers against decapentaplegic.

name

1. (abbreviation, acronym, alt-of)Acronym of Michigan algorithm decoder, a programming language, a variant of ALGOL, developed in 1959 at the University of Michigan.