If a person engages in behavior through a "course of conduct" or repeated actions with the intent to put someone else in fear of bodily injury that's considered stalking. It's also considered stalking if the course of conduct or repeated actions causes the other person "substantial emotional distress." The classic definition of stalking is when a person follows or harasses another person without consent and either 1.) with intent to harm or cause fear of harm or 2.) in such a way that causes the other person substantial emotional distress.