a body that exhibits all scientific indications of brain death
a pocket which death turns inside out and empties
a symbol of 'corruption and death
In certain MMOs, a corpse appears where the player died. Sometimes all the player's items and money are left on the corpse and the player is teleported back to their bind spot. Corpses typically will decay after a certain time proportional the character's level.
On most muds, when an avatar dies, a new object is created and left behind at the location of the avatar's death, to represent the avatar's corpse. Of course, the avatar is also generally reincarnated immediately. This leads to the interesting phenomenon of a given player having two bodies (or more, if they are unfortunate enough to die a lot) at once.