A pvp world is a place where anyone can attack anyone in their combat level limit everywhere except for banks, grand exchange, buildings, etc. Take note that you WILL NOT get a gravestone upon death, and will only keep 3 items (4 items if you're using the Protect Item prayer, which can be gained at a Prayer level of 25). If you have a skull above your head (commonly known as "skulled"), then you will loose all of your items upon death. A skull above your head is obtained when you are the first the attack a certain player. For more information, please visit http://www.runescape.com/kbase/viewarticle.ws?article_id=815 . From, SonicProXD.