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No act of kindness is ever wasted.
We strongly condemn any act of violence against innocent people.
groups committing criminal acts
She isn't really upset: it's all an act.
She's just putting on an act because the boys are here.
He eats fire as part of his act.
The scene occurs at the beginning of the first act.
Act 1 Scene 2
Ken's a hard act to follow, but I'll do my best.
She stopped in the act of turning and stared at me.
He denies all guilt, even though he was caught in the act.
First it was politicians; now a novelist has decided to get in on the act.
If you want to be finished by Monday, you'll have to get your act together.
This is the British English definition of act. View American English definition of act.