Meaning

• To conduct (oneself) well, or in a given way.

  "You need to behave yourself, young lady."

• To act, conduct oneself in a specific manner; used with an adverbial of manner.

  "He behaves like a child whenever she's around."

• To conduct, manage, regulate (something).

• To act in a polite or proper way.

  "His mother threatened to spank him if he didn't behave."