Definition - What does Terry Stop mean?
Terry stop refers to the stopping of a person by any law enforcement agent based on their (reasonable) suspicion that the person might be involved in some criminal activity. A Terry stop is different to an arrest, where the level of suspicion is usually high.
Justipedia explains Terry Stop
The term "Terry stop" got its name from a famous court case, Terry v. Ohio, in 1968. The issue in the case was whether law-enforcing agencies should be allowed to detain a person and conduct a limited search in the absence of probable cause.