Share this entry

mental illness Line breaks: men¦tal ill|ness

Definition of mental illness in English:


A condition which causes serious disorder in a person’s behaviour or thinking.
Example sentences
  • There are a huge number of people who have serious mental illnesses who don't always have the illness in an acute manner.
  • Bipolar affective disorder is a common condition which, among mental illnesses, ranks second only to unipolar depression as a cause of worldwide disability.
  • There are many different kinds of neuro-psychiatric disorders or mental illnesses where hallucination plays a role.

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day innocuous
Pronunciation: ɪˈnɒkjʊəs
not harmful or offensive