mental
1 Americanadjective
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of or relating to the mind.
mental powers;
mental suffering.
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of, relating to, or affected by a disorder of the mind.
a mental patient;
mental illness.
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providing care for persons with disordered minds, emotions, etc..
a mental hospital.
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performed by or existing in the mind.
mental arithmetic;
a mental note.
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pertaining to intellectuals or intellectual activity.
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Informal. slightly daft; out of one's mind; crazy.
He's mental.
noun
adjective
adjective
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of or involving the mind or an intellectual process
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occurring only in the mind
mental calculations
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Preferred form: psychiatric. affected by mental illness
a mental patient
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Preferred form: psychiatric. concerned with care for persons with mental illness
a mental hospital
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slang insane
adjective
Usage
What does mental mean? Mental is an adjective that means relating to the mind.It is especially used in contrast with physical, which means relating to the body. Mental is commonly used in the context of psychological disorders or the care and treatment of people who have them. One of its most common uses is in the phrase mental health.Mental is sometimes used as a slang term with the same meaning as the informal sense of crazy, especially in the U.K. It’s typically used to describe a person or their behavior as being extreme or illogical in some way. Keep in mind, however, that when used in this way, words like crazy and mental may reinforce harmful stereotypes and associations with mental illness.Example: To be an elite athlete, you have to be physically strong, but you also have to perfect the mental aspects of your game.
Other Word Forms
- mentally adverb
Etymology
Origin of mental1
First recorded in 1375–1425; late Middle English, from Middle French, from Late Latin mentālis, equivalent to Latin ment- (stem of mēns ) mind + -ālis -al 1
Origin of mental2
First recorded in 1720–30; from Latin ment(um) “the chin” ( mentum ) + -al 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In 2024, Goodwin Procter started a program called “Thriving with ADHD,” which addressed issues around task initiation, sleep, mental health and working with colleagues with ADHD.
From The Wall Street Journal • Apr. 5, 2026
The number with serious mental health issues, particularly trauma, is also “very high,” they said.
From Los Angeles Times • Apr. 5, 2026
The Lakers are making the mental adjustment of playing without Doncic.
From Los Angeles Times • Apr. 4, 2026
"Hearing how our game has helped our players with their anxiety and mental health has been really rewarding to us," said Harper.
From BBC • Apr. 3, 2026
“Your father and I are worried about you, Dana. We’ve decided you could use a mental health day off school.”
From "Linked" by Gordon Korman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
