mad
C1Informal (for angry/enjoyment senses). Formal/Archaic (for mental illness sense).
Definition
Meaning
Suffering from a serious mental illness (archaic/clinical); extremely angry.
Foolish, irrational, or lacking sense; wildly enthusiastic about something; chaotic or exciting; (of a dog) having rabies.
Linguistics
Semantic Notes
The meaning has shifted significantly over time from 'insane' (core, now often avoided) to primarily 'angry' (esp. AmE) and 'very enthusiastic' (esp. BrE). The 'angry' sense is considered informal but is extremely common. Use with care due to potential offensiveness in the 'insane' sense.
Dialectal Variation
British vs American Usage
Differences
British English strongly prefers 'angry' with the preposition 'at' (mad at someone). The 'very enthusiastic' sense (mad about cricket) is more common in BrE. American English uses 'mad' primarily to mean 'angry' (very common) and retains the 'insane' sense more in fixed expressions (like a mad scientist).
Connotations
In BrE, 'mad' can sound more emotional or childish for 'angry' compared to 'angry' or 'cross'. In AmE, 'mad' is the default, neutral informal term for 'angry'.
Frequency
For 'angry', very high frequency in AmE, moderate in BrE (where 'angry' is more neutral). For 'enthusiastic', moderate frequency in BrE, low in AmE.
Vocabulary
Collocations
Grammar
Valency Patterns
be/get mad at [person] (anger)be mad about [thing/person] (enthusiasm/love)go mad (become insane/act wildly)drive [someone] mad (annoy greatly)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “mad as a hatter”
- “mad as a March hare”
- “hopping mad”
- “mad keen (BrE)”
- “mad about the boy”
- “like mad (very fast/hard)”
Usage
Context Usage
Business
Rare; considered unprofessional (e.g., 'The client was mad about the delay').
Academic
Avoided except in historical/linguistic discussion of the term's evolution.
Everyday
Very high frequency, especially in AmE for 'angry' and BrE for 'enthusiastic' ('I'm mad about that new series').
Technical
Not used in clinical psychology; replaced by specific diagnoses. Appears in literature and cultural studies.
Examples
By Part of Speech
verb
British English
- N/A (rare, archaic 'to madden' exists)
American English
- N/A (rare, archaic 'to madden' exists)
adverb
British English
- He ran mad fast to catch the bus. (informal, intensifier)
American English
- She's mad talented at drawing. (informal, intensifier)
adjective
British English
- He's absolutely mad about vintage cars.
- Are you mad at me for being late?
- It was a mad idea to go out in that storm.
American English
- She was really mad at her brother.
- The traffic was mad this morning.
- He has a mad crush on his neighbour.
Examples
By CEFR Level
- My dad was mad when I broke the window.
- The dog is mad. Be careful!
- Don't be mad at me, it was an accident!
- She's mad about tennis and plays every day.
- The constant noise is driving me mad.
- He made a mad dash for the last train.
- Critics were mad for the director's avant-garde new film.
- The proposal was dismissed as the mad ravings of a fantasist.
Learning
Memory Aids
Mnemonic
MAD = My Anger Doubles. A MAD dog acts irrationally and dangerously.
Conceptual Metaphor
ANGER IS INSANITY (blind with rage, mad with fury); ENTHUSIASM IS A DISEASE (mad about jazz); CHAOS IS INSANITY (a mad scramble).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'mad' as 'сумасшедший' when it means 'angry' (use 'злой', 'сердитый').
- The phrase 'like mad' means 'очень быстро/усердно', not 'как сумасшедший' in a literal sense.
- 'Mad about' can mean 'без ума от' (love) or 'злиться из-за' depending on context.
Common Mistakes
- *I was very mad on the new film. (Correct BrE: 'mad about')
- Using 'mad' in formal writing to mean 'angry'.
- Confusing 'mad at' (person) and 'mad about' (situation/thing) in AmE.
Practice
Quiz
In British English, which sentence CORRECTLY uses 'mad' in a common sense?
FAQ
Frequently Asked Questions
Yes, in modern contexts referring to mental health. It's considered stigmatising and inaccurate. Use specific clinical terms or neutral language like 'has a mental health condition'. The archaic/literary sense survives in fixed phrases ('mad scientist').
'Mad at' is used with a person (object of anger): 'I'm mad at you.' 'Mad about' has two meanings: 1) angry concerning a situation/thing ('I'm mad about the decision'). 2) (BrE) very enthusiastic about ('He's mad about football').
No. Its primary modern meanings ('angry', 'enthusiastic', 'foolish') are informal. For formal contexts, use 'angry', 'enthusiastic', or 'irrational'.
Generally yes, due to media exposure, but default interpretations differ. An American hearing 'I'm mad about him' might first think 'angry', while a Brit would think 'very fond of'. Context usually clarifies.
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