Martha Gill’s argument that mental health definition has become so widened as to become almost meaningless makes a fundamentally important point (Comment). As a society, we have amalgamated several meanings under the umbrella term “mental health”. Mental health should be thought of as three concepts:

 wellbeing that is relevant to all of us, whether we have a mental health disorder or not;

 common mental disorder such as mild to moderate depression and anxiety, which can be discomfiting and need treatment;

 severe mental illness such as psychosis, schizophrenia, bipolar disorder and severe personality disorders, addictions and severe depression.