The term 'track down' is a phrase used to describe the process of finding something or someone. It involves tracing, finding, dogging, hunting, locating, hounding, and researching. Tracing is the act of following a path or route in order to FIND something or someone. Finding is the act of discovering something or someone that was previously unknown. Dogging is the act of following someone or something closely. Hunting is the act of searching for something or someone. Locating is the act of determining the exact position of something or someone. Hounding is the act of pursuing someone or something persistently. Locating is the act of finding the exact place where something or someone is located. Researching is the act of gathering information about something or someone. All of these activities are part of the process of tracking down something or someone.