mental

1
[men-tl]
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adjective
  1. of or relating to the mind: mental powers; mental suffering.
  2. of, relating to, or affected by a disorder of the mind: a mental patient; mental illness.
  3. providing care for persons with disordered minds, emotions, etc.: a mental hospital.
  4. performed by or existing in the mind: mental arithmetic; a mental note.
  5. pertaining to intellectuals or intellectual activity.
  6. Informal. slightly daft; out of one's mind; crazy: He's mental.
noun
  1. Informal. a person with a psychological disorder: a fascist group made up largely of mentals.

Origin of mental

1
1375–1425; late Middle English < Late Latin mentālis, equivalent to Latin ment- (stem of mēns) mind + -ālis -al1

mental

2
[men-tl]
adjective
  1. of or relating to the chin.

Origin of mental

2
1720–30; < Latin ment(um) the chin (see mentum) + -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for mental

mental

1
adjective
  1. of or involving the mind or an intellectual process
  2. occurring only in the mindmental calculations
  3. affected by mental illnessa mental patient Preferred form: psychiatric
  4. concerned with care for persons with mental illnessa mental hospital Preferred form: psychiatric
  5. slang insane
Derived Formsmentally, adverb

Word Origin for mental

C15: from Late Latin mentālis, from Latin mēns mind

mental

2
adjective
  1. anatomy of or relating to the chinAlso: genial

Word Origin for mental

C18: from Latin mentum chin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for mental
adj.

early 15c., "pertaining to the mind," from Middle French mental, from Late Latin mentalis "of the mind," from Latin mens (genitive mentis) "mind," from PIE root *men- "to think" (cf. Sanskrit matih "thought, mind," Gothic gamunds, Old English gemynd "memory, remembrance;" see mind (n.)). Meaning "crazy, deranged" is from 1927, probably from combinations such as mental hospital.

Online Etymology Dictionary, © 2010 Douglas Harper