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mad
1[ mad ]
adjective
- mentally disturbed; deranged; insane; demented.
- enraged; greatly provoked or irritated; angry.
- (of animals)
- abnormally furious; ferocious:
a mad bull.
- affected with rabies; rabid:
a mad dog.
- extremely foolish or unwise; imprudent; irrational:
a mad scheme to invade France.
Synonyms: unsafe, perilous, dangerous, ill-advised
- wildly excited or confused; frantic:
mad haste.
Synonyms: frenzied
- overcome by desire, eagerness, enthusiasm, etc.; excessively or uncontrollably fond; infatuated:
He's mad about the opera.
- wildly lively and merry; enjoyably hilarious:
to have a mad time at the Mardi Gras.
- (of wind, storms, etc.) furious in violence:
A mad gale swept across the channel.
- Slang. much or many:
Mad props for getting this organization off the ground.
adverb
- Slang. very; extremely:
It's mad hot in this car.
verb (used with object)
- Archaic. to make mad.
verb (used without object)
- Archaic. to be, become, or act mad.
MAD
2[ mad ]
mad.
3abbreviation for
- madam.
mad
1/ mæd /
adjective
- mentally deranged; insane
- senseless; foolish
a mad idea
- informal.often foll by at angry; resentful
- foll byabout, on, or over; often postpositive wildly enthusiastic (about) or fond (of)
mad about football
football-mad
- extremely excited or confused; frantic
a mad rush
- temporarily overpowered by violent reactions, emotions, etc
mad with grief
- of animals
- unusually ferocious
a mad buffalo
- afflicted with rabies
- like mad informal.with great energy, enthusiasm, or haste; wildly
- mad as a hattercrazily eccentric
verb
- archaic.to make or become mad; act or cause to act as if mad
MAD
2/ mæd /
acronym for
- mutual assured destruction: a theory of nuclear deterrence whereby each side in a conflict has the capacity to destroy the other in retaliation for a nuclear attack
Usage Note
Derived Forms
- ˈmaddish, adjective
Other Words From
- half-mad adjective
- half-mad·ly adverb
- half-mad·ness noun
- qua·si-mad adjective
- qua·si-mad·ly adverb
- un·mad adjective
- un·mad·ded adjective
Word History and Origins
Origin of mad1
Word History and Origins
Origin of mad1
Idioms and Phrases
- have a mad on, Informal. to be angry for a period of time; be in a bad mood:
The last time he had a mad on, it lasted for days.
- like mad, Informal. with great haste, impulsiveness, energy, or enthusiasm:
She ran like mad to catch the bus.
- mad as a hatter, completely insane.
More idioms and phrases containing mad
- crazy (mad) about
- drive someone crazy (mad)
- hopping mad
- like crazy (mad)
- stark raving mad
Synonym Study
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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