mad Meaning in the Cambridge English Dictionary
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Meaning of “mad” in the English Dictionary

"mad" in British English

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madadjective

uk   us   /mæd/ (madder or maddest)

mad adjective (MENTALLY ILL)

B1 mentallyill, or ​unable to ​behave in a ​reasonable way: I ​think I must be going mad. Do I ​look like some mad ​old woman in this ​hat?
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mad adjective (SILLY)

B1 UK informal (US usually crazy) extremelysilly or ​stupid: [+ to infinitive] You're mad towalkhomealone at this ​time of ​night. He must be mad ​spending all that ​money on a ​coat. Some of the things she does are completely mad.
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mad adjective (ANGRY)

A2 [after verb] informal very ​angry or ​annoyed: He's always ​complaining and it makes me so mad.mainly US Are you still mad at me?UK Kerry got really mad with Richard for not doing the ​washing up.UK Bill's ​untidiness drives me mad.
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mad adjective (HURRYING)

[before noun] UK hurrying or ​excited and not having ​time to ​think or ​plan: We made a mad dash for the ​train. I was in a mad panic/​rushtrying to get everything ​ready.

mad adjective (ENTHUSIASTIC)

be mad about sb/sth B1 informalUK to ​love someone or something: He's the first ​realboyfriend she's had and she's mad about him. He's mad about ​football.be mad for sb/sth UK informal to ​want someone or something very much, or to be very ​interested in someone or something: Everyone's mad for him and I just don't ​see the ​attraction.

-madsuffix

uk   us   /-mæd/ UK
car-mad, clothes-mad, sex-mad, etc. extremelyinterested in ​cars, ​clothes, ​sex, etc.: She's 16 and clothes-mad.
(Definition of mad from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mad" in American English

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madadjective [-er/-est only]

 us   /mæd/ (-dd-)

mad adjective [-er/-est only] (ANGRY)

angry or ​annoyed: I get so mad at her I sometimes ​startscreaming.

mad adjective [-er/-est only] (NOT CONTROLLED)

(of an ​activity) ​wild, ​fast, or ​excited and not well ​controlled: We made a mad ​dash for the ​schoolbus.

mad adjective [-er/-est only] (ENTHUSIASTIC)

infml very ​enthusiastic and ​interested: Jeanne’s mad about ​old Woody Allen ​movies.

mad adjective [-er/-est only] (MENTALLY ILL)

mentallyill, or ​unable to ​behave in a ​reasonable way; insane : In his ​years as a ​prisoner of ​war, he often ​felt as if he might go mad.
(Definition of mad from the Cambridge Academic Content Dictionary © Cambridge University Press)
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