■ adjective
1》 relating to, done by, or occurring in the mind.
2》 relating to disorders or illnesses of the mind.
↘ informal mad; crazy.
Derivatives
~ly adverb
Origin
ME: from late L. ~is , from L. mens , ment- 'mind'.
Usage
The use of ~ in compounds such as ~ hospital was the normal accepted term in the first half of the 20th century. It is now, however, regarded as old-fashioned, sometimes even offensive, and has been largely replaced by psychiatric .