Stalker/ˈstɔːkər/ Definition 1 of 3Pro Tip 1/3Threat Implication Implies the person poses a potential danger and causes fear. She changed her phone number to escape her persistent stalker. Pro Tip 2/3Legal Consequences Using 'stalker' suggests that legal action may be necessary or has been taken. The court issued a restraining order against the stalker. Pro Tip 3/3Persistent Behavior The behavior is ongoing and not a one-time event. Her stalker would show up at every event she attended.