Learn about the process, standards and purposes of post mortem examinations performed by pathologists. Find out how to view the body, consent to tissue retention and deal with forensic cases. Autopsy/Postmortem is a medical procedure involving the examination of the body of a dead person to determine the cause and manner of death. Autopsy/postmortem aids in finding out missed diagnosis. A post-mortem, also known as an autopsy, is the examination of a body after death. The aim of a post-mortem is to determine the cause of death. Definition of post-mortem noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.