English Reference
adjective · adverb

mad

adj. · adv.
US /ˈmæd/ UK /mˈæd/ mad UK spelling madded, mads

  1. 01 B1 Intermediate British English

    adj.having a mind that does not work in a healthy way; mentally ill.

    adj.suffering from a mental illness or being extremely foolish. This is the primary sense in British English.

    Simple

    The old stories tell of a king who went mad and talked to the trees.

    In context

    In nineteenth-century literature, characters were often described as going mad when they could no longer cope with social pressures.

    Usage

    Often used in the phrase 'go mad'.

    Teacher's tip

    In modern contexts, using this to describe mental health can be seen as insensitive; 'mentally ill' is the neutral alternative.

  2. 02 B1 Intermediate Informal

    adj.liking something very much or being very excited about it.

    adj.extremely enthusiastic about or fond of something.

    Simple

    My brother is mad about football and never misses a game.

    In context

    She was mad about jazz in her youth, spending every spare penny on vinyl records and concert tickets.

    Usage

    Usually followed by the preposition 'about'.

  3. 03 B2 Upper Intermediate

    adj.very silly, stupid, or not making any sense.

    adj.extremely foolish, unwise, or irrational.

    Simple

    It was a mad idea to go hiking in the middle of a thunderstorm.

    In context

    The plan to expand the factory without securing extra funding was seen by many as a mad gamble.

  4. 04 C1 Advanced SlangAmerican English

    adv.used to mean 'very' or 'extremely' to make an adjective stronger.

    adv.used as an intensifier to mean 'extremely' or 'very'.

    Simple

    That new video game is mad expensive, so I have to save up for it.

    In context

    The concert was mad loud, but the atmosphere was incredible despite the noise levels.

This entry
Level B1 · Intermediate
Frequency Common
Updated