mentally ill

The term mentally ill is used to describe individuals living with psychiatric conditions or disorders that affect mood, thinking, and behavior. Rooted in the medical model of healthcare, the phrase classifies psychological distress as an illness analogous to physical sickness. Historically, the adoption of this terminology marked a shift away from moral or spiritual interpretations of behavior (such as "possessed" or "bad") and replaced older, pejorative terms like "insane" or "lunatic."

Usage of the term is currently contested regarding the distinction between identity-first and person-first language. Critics often argue that "mentally ill" is reductive and stigmatizing because it defines a person solely by their diagnosis; these advocates typically prefer person-first phrasing (e.g., "person with a mental illness") or broader terms like "person with a mental health condition." Conversely, others argue that "mentally ill" is a necessary medical descriptor for securing legal rights and insurance coverage. Furthermore, some within the disability rights movement reclaim identity-first language to assert that their condition is an intrinsic part of their experience that does not need to be separated from their personhood linguistically.

Example:
"The new legislation aims to provide better housing support for the mentally ill."

Example:
"While some find the label helpful, he prefers not to be referred to as mentally ill, identifying instead as a psychiatric survivor."