any of various conditions that affect a person's thoughts, emotions, or behaviour in an atypical and distressing manner
WordReference Random House Unabridged Dictionary of American English © 2025
men′tal ill′ness,
- Psychiatryany of the various forms of psychosis or severe neurosis. Also called men′tal disor′der, men′tal disease′.
- 1960–65
Collins Concise English Dictionary © HarperCollins Publishers::
'mental illness' also found in these entries (note: many are not synonyms or translations):
Breuer
- Henry VI
- Minnesota Multiphasic Personality Inventory
- Rank
- Regency
- affect
- alienist
- anxiety
- biological psychiatry
- clanging
- clinical psychology
- crazy
- disturbed
- exogenous
- indifference
- institutionalize
- insulin-coma therapy
- leucotomy
- lobotomy
- lucid
- lunacy
- lunatic
- megalomania
- mental
- nut
- nutcase
- nutter
- obsession
- obsessive
- postpartum psychosis
- psychiatric
- psychiatry
- psychoendocrinology
- psychotherapy
- screw
- slate
- somatic therapy
- somatization disorder
- theomania
- thought disorder
- wacko