Synonyms of mental
1
a
: of or relating to the mind
specifically : of or relating to the total emotional and intellectual response of an individual to external reality
mental health
b
: of or relating to intellectual as contrasted with emotional activity
mental acuity
c
: of, relating to, or being intellectual as contrasted with overt physical activity
made quick mental calculations
d
: occurring or experienced in the mind : inner
mental anguish
a mental breakdown
e
: relating to the mind, its activity, or its products as an object of study : ideological
mental science
f
: relating to spirit or idea as opposed to matter
… the distinction between physical things and mental ideas.John W. Yolton
2
a(1)
often offensive : of, relating to, or affected by a psychiatric disorder
a mental patient
(2)
sometimes offensive : mentally unsound : mad, crazy
… was going a bit mental from old age …Nevil Shute
not used technically
b
sometimes offensive : intended for the care or treatment of persons affected by psychiatric disorders
mental hospitals
3
: of or relating to telepathic or mind-reading powers
mental telepathy

mental

2 of 2

adjective (2)

: of or relating to the chin : genial

Examples of mental in a Sentence

Adjective (1) a funny mental image made him laugh out loud humane treatment of mental patients
Recent Examples on the Web
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Adjective
The Treasury Department only issues paper checks in limited circumstances — such as for people over 90, with mental impairments or who live in remote areas without reliable access to electronic banking. Brian Sloan, CNBC, 21 July 2026 Antioxidants in olive oil may support cognition (mental processes) and protect the brain from damage. Brittany Lubeck, Verywell Health, 21 July 2026 Leaders face intense workloads, and these stressors can trigger rumination and other mental impediments. Julian Hayes Ii, Forbes.com, 21 July 2026 Dominguez’s mental state at the time of the attacks was central to both trials. Darrell Smith, Sacbee.com, 21 July 2026 See All Example Sentences for mental

Word History

Etymology

Adjective (1)

Middle English, from Late Latin mentalis, from Latin ment-, mens mind — more at mind

Adjective (2)

Latin mentum "chin" + -al entry 1 — more at mouth entry 1

First Known Use

Adjective (1)

15th century, in the meaning defined at sense 1a

Adjective (2)

circa 1727, in the meaning defined above

Time Traveler
The first known use of mental was in the 15th century

Browse Nearby Words

Cite this Entry

“Mental.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mental. Accessed 26 Jul. 2026.

Kids Definition

mental

adjective
men·​tal
ˈment-ᵊl
1
a
: of or relating to the mind
mental powers
mental health
b
: carried on in the mind
mental arithmetic
c
: occurring or experienced in the mind
mental anguish
a mental breakdown
2
sometimes offensive : intended for the care of persons affected by mental illnesses
mental hospitals
mentally
-ᵊl-ē
adverb

Medical Definition

mental

1 of 2 adjective
1
a
: of or relating to the mind
specifically : of or relating to the total emotional and intellectual response of an individual to external reality
b
: of or relating to intellectual as contrasted with emotional activity
2
a
often offensive : of, relating to, or affected by a psychiatric disorder
a mental patient
b
sometimes offensive : intended for the care or treatment of persons affected by psychiatric disorders
mental hospitals

mental

2 of 2 adjective
: of or relating to the chin : genial

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