Postmortem is a term that refers to something that occurs or is done after death. In its most common usage, it describes an examination of a deceased person's body to determine the cause and manner of their death. This type of postmortem examination may involve autopsy procedures, where the body is cut open and internal organs are inspected for signs of injury or disease.
In addition to its use in medical contexts, "postmortem" can also refer to any analysis or evaluation that takes place after an event has occurred. For example, a postmortem review of a failed project at work might involve examining the reasons behind the failure in order to learn from it and prevent similar problems in the future.
Overall, the term "postmortem" generally refers to something done or analyzed after death, whether that be a physical autopsy or an evaluation of events that have already happened.