Player versus Environment. A game environment in which players can attack and kill NPCs and MOBs.

Player versus environment, sometimes called player vs monster.

Player versus Player; when actual players are pitched against other actual players. See also: Carebear

Player versus Enemy; see 'PvM.'

Player versus enivronment (Same as PVM).

Player vs Environment. Generally the same as PVM below.

Player versus Enviroment. Players killing monsters for experience or gold.

Player vs. Environment. Combat between players and computer controlled opponents.

"Player vs. Environment" - typically used to refer to "standard" servers where player vs. player combat is only possible when both sides enter pvp mode (aka "flagging")

Player versus enviornment which refers to game combat where a human player is engaged in combat with mobs.

Player vs. Environment. Environment stands for all monsters (mobs) in the world