1. A medical specialty that is concerned with the diagnosis of diseases that are based on the normally visible, microscopic, and molecular examination of organs, tissues, and whole bodies: An anatomic pathology is an autopsy that is done after a person's death.
2. The anatomical investigation of changes in the function, structure, or appearance of organs, or tissues, including postmortem examinations and the study of biopsy specimens: Judy was especially interested in the nature of diseases and their causes, so she decided to specialize in anatomic pathology in medical school.