bang definition

1. a sudden very loud noise
2. a border of hair that is cut short and hangs across the forehead
3. the swift release of a store of affective force
• examples: they got a great bang out of it
• examples: what a boot!
• examples: he got a quick rush from injecting heroin
• examples: he does it for kicks
4. to produce a sharp often metallic explosive or percussive sound
• examples: One of them banged the sash of the window nearest my bed
5. move noisily
• examples: The window banged shut
• examples: The old man banged around the house
6. directly
• examples: he ran bang into the pole
• examples: ran slap into her