(1) Occuring after death. (2) Following the event.
In their postmortem discussion of the election, the reporters tried to explain how the polls and predictions could have been so completely wrong.
Post mortem is Latin for "after death." In English, postmortem refers to an examination, investigation, or process that takes place after death. Postmortem examinations of bodies are often needed to determine the time and cause of death; rigor mortis, the temporary stiffening of muscles after death, is one postmortem change that doctors look at to determine time of death. We have come to use postmortem to refer to any examination or discussion that takes place after an event.