Definition from macmillandictionary.com
Your browser doesn’t support HTML5 audio
The children behaved very badly.
a badly behaved dog
You behaved like a complete idiot!
This is not how you behave towards a child.
He behaved as though he hadn’t seen Ellie.
She was embarrassed at having behaved in such a childish way.
Mum’s always telling me to behave when we go out.
I hope the children behave themselves.