Meaning of “behave” - Learner’s Dictionary

behave

verb [ I ] uk us /bɪˈheɪv/
DO/SAY

B1 to do or say things in a particular way:

to behave badly/stupidly
They are behaving like children.
POLITELY (also behave yourself)

B1 to be polite and not make a situation difficult:

Try to behave.
The children can only come if they promise to behave themselves.
→ Opposite misbehave

(Definition of “behave” from the Cambridge Learner’s Dictionary © Cambridge University Press)