a medical examination of a dead person's body in order to find out the cause of death

to conduct a post-mortem examination 进行尸检

a discussion of an event after it has happened, especially of what was wrong with it or why it failed

After we lose a game, there's usually a post-mortem over a few beers. 打完一场比赛，我们常边喝啤酒边作总结。