1. to treat or regard (something normal or acceptable) as a disease or disorder; to classify as pathological
Usage: chiefly British spelling (American: pathologize); often used critically to describe the medicalization of normal behavior or conditions
2. to study or analyze the nature and cause of disease in (tissue, an organism, or a condition)
Usage: technical/medical usage

Examples

• Critics argue that modern society tends to pathologise normal childhood behavior like restlessness.
• The medical team pathologised the tissue samples to determine the extent of the disease.
• Some psychologists worry that we pathologise grief and sadness rather than accepting them as natural responses.
• Researchers pathologised the affected organs to understand the progression of the illness.
• Mental health advocates caution against pathologising introversion as a social disorder.