The manner in which one behaves
The way in which a machine or other thing performs or functions
The action of an organism under given circumstances
My sisters will instruct you in the behavior I expect of you.
"Boss, you can send her to behavior modification training," Pierre suggested.
Darcie couldn't stand the gossip and rude behavior in every town, so she finally went back to the Indians.
Fred O'Connor's usual behavior was often erratic.
But in spite of his aggressive behavior, she felt safe with him.