1. very angry
Usage: informal
2. having a mental illness; insane
Usage: potentially offensive; clinical contexts
3. extremely enthusiastic about something
Usage: informal

1. to make angry or crazy
Usage: archaic; rare

Examples

• She was mad at her brother for breaking her toy.
• The crowd went mad when their team scored the winning goal.
• He’s mad about baseball and never misses a game.
• The dog made a mad dash across the yard.
• Don’t drive me mad with all that noise!
• The scientist had a mad idea that actually worked.
• Traffic was moving at a mad pace during rush hour.