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mental1

[men-tl] /ˈmɛn tl/
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
7.
Informal. a person with a psychological disorder:
a fascist group made up largely of mentals.
Origin of mental1
late Middle English
1375-1425
1375-1425; late Middle English < Late Latin mentālis, equivalent to Latin ment- (stem of mēns) mind + -ālis -al1

mental2

[men-tl] /ˈmɛn tl/
adjective
1.
of or relating to the chin.
Origin
1720-30; < Latin ment(um) the chin (see mentum) + -al1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for mental
Contemporary Examples
Historical Examples
  • And the minute you get mental discords no stand against fear is possible.

  • Hyperboreans have a mental disease which renders them liable to suggestion.

    Folkways William Graham Sumner
  • They absorbed her atmosphere and after each followed a period of mental asphyxy.

    Weighed and Wanting George MacDonald
  • These transcendental notions were the beginning of the mental outfit of mankind.

    Folkways William Graham Sumner
  • They are suffering from a mental disease of discouragement and loss of hope.

    The Victorious Attitude Orison Swett Marden
British Dictionary definitions for mental

mental1

/ˈmɛntəl/
adjective
1.
of or involving the mind or an intellectual process
2.
occurring only in the mind: mental calculations
3.
affected by mental illness: a mental patient Preferred form psychiatric
4.
concerned with care for persons with mental illness: a mental hospital Preferred form psychiatric
5.
(slang) insane
Derived Forms
mentally, adverb
Word Origin
C15: from Late Latin mentālis, from Latin mēns mind

mental2

/ˈmɛntəl/
adjective
1.
(anatomy) of or relating to the chin Also genial
Word Origin
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
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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
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mental in Medicine

mental men·tal1 (měn'tl)
adj.

  1. Of or relating to the mind; intellectual.

  2. Of, relating to, or affected by a disorder of the mind.

  3. Intended for treatment of people affected with disorders of the mind.

mental 2
adj.
Of or relating to the chin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for mental

mental

adjective

Crazy; deranged; nutty: And the son, William, went absolutely mental (1927+ British)

noun

A deranged person; nut (1913+ British)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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