@ Kings Abbot - It takes two to have an argument. For any discussion thread, the definition used by the author of the thread is the one best used to move the discussion forward, whether you agree with that as the definition or not.
To some people, pvp only means PKing. To others it can include both PKing and other player-vs-player activities, such as Castle Wars, Fight Cave, Trouble Brewing. Arguing over the definition does not contribute to the discussion or move the discussion forward. Instead it sidetracks it and starts to pull the discussion off topic.