Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mad”

See all translations

mad

adjective
 
 
/mæd/
CRAZY mainly UK informal B1 stupid or crazy: [+ to do sth] You're mad to walk home alone at night.Of unsound mindStupid and silly
ANGRY A2 mainly US angry: Were your parents mad at you when you came home late?Angry and displeasedBad-tempered
go mad UK to become very angry: Dad'll go mad when he finds out you took the car.Becoming angry and expressing anger to suddenly become very excited: When the band arrived on stage, the crowd went mad.Excited, interested and enthusiastic
be mad about sb/sth informal B1 to love someone or something: She's mad about Hugh Grant. Jo's mad about skiing.Loving and in love
SICK mainly UK B1 mentally illMental and psychiatric disordersOf unsound mindStupid and silly
NOT CONTROLLED not controlled: We made a mad dash for the exit.Mental and psychiatric disordersUncontrolledEnergetic and lively
like mad B2 If you run, work, etc like mad, you do it very quickly and with a lot of energy.Fast and rapidShort in time B2 If something hurts like mad, it hurts a lot.Pain and painfulIntensifying expressions
(Definition of mad from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

More Learner's Dictionary definitions for “mad”

Definitions of “mad” in other dictionaries

Word of the Day

pup

a baby of particular animals, or a puppy

Word of the Day

I won’t tolerate it! Replacing formal words with phrasal verbs.

by Liz Walter,
April 01, 2015
When you are using a language, it is important to understand if a word is formal or informal, so that you can use it in an appropriate way. You might hear people saying dosh for money, or spud for potato, but they wouldn’t write those words in a formal essay. Similarly, a

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More