- (uncountable) Mischief is the intention to cause minor trouble or the trouble caused.
- Synonym: trouble
- "I scared you, didn't I?" she asked, her eyes full of mischief.
- I hope you'll stay out of mischief when we go to church this morning.
- (uncountable) (formal) Mischief is the illegal act of damaging the property of others.
- He was charged with criminal mischief after he damaged a security camera.