as in stable
having full use of one's mind and control over one's actions
went to court to prove that her grandmother was no longer compos mentis and needed a legal guardian
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Recent Examples of compos mentis
Second, and more important, while Biden’s voice may be faltering, and some of his sentences rest incomplete, there is little question which candidate is less compos mentis than the other.
—
Jack Rakove, Chicago Tribune, 18 July 2024
Too a Real President meeting yesterday largely succeeded in its immediate goal: News coverage showed Trump in the act of president-ing with the air of a man who is, if not a stable genius, at least compos mentis.
—Jonathan Chait, Daily Intelligencer, 10 Jan. 2018
Jack Rakove, Chicago Tribune, 18 July 2024
Too a Real President meeting yesterday largely succeeded in its immediate goal: News coverage showed Trump in the act of president-ing with the air of a man who is, if not a stable genius, at least compos mentis.
—Jonathan Chait, Daily Intelligencer, 10 Jan. 2018
Recent Examples of Synonyms for compos mentis
Adjective
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The prosecution said a medical report noted Lai’s general health condition remained stable.—
Kanis Leung,
Los Angeles Times,
9 Feb. 2026
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Mohan highlighted that a favorable mix shift to higher capacity HDDs, stable pricing, and a focus on cost improvements could fuel gross margin above 50%, an operating margin of more than 40%, and EPS higher than $20.—
TipRanks,
CNBC,
8 Feb. 2026
Adjective
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Their film casts a lucid, uncompromising, yet deeply necessary light on the spiral of violence.—
Naman Ramachandran,
Variety,
11 Feb. 2026
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Perhaps not lucid dreams, but elucidating ones.—
Shaad D’Souza,
Pitchfork,
27 Jan. 2026
Adjective
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Under normal conditions, these signals go straight to the robot’s central processing unit.—
New Atlas,
New Atlas,
8 Feb. 2026
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Researchers around the world are now finding microplastics – tiny plastic fragments and fibers smaller than a grain of rice – in garden soils and compost products that look perfectly normal to the naked eye.—
Dr. Avishesh Neupane,
Hartford Courant,
7 Feb. 2026
Adjective
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Our affordability proposals will be part of a responsible, balanced budget because that’s what governing actually requires.—
Christopher Keating,
Hartford Courant,
11 Feb. 2026
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The festival is also on a solid footing for now, Tuttle says, having secured a balanced budget and around 60% of income self-generated through ticket sales, sponsorship and market activity.—
Elsa Keslassy,
Variety,
10 Feb. 2026
Adjective
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Perardi tried to stay rational.—
Matthew Bremner,
Rolling Stone,
11 Feb. 2026
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This disconnect between individual choice and individual benefit represents not merely an economic inefficiency but a philosophical failure to respect the rational agency of health care consumers.—
Jared Rhoads,
STAT,
10 Feb. 2026
Adjective
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The hope for a big payout could lead kidnappers to keep the victim healthy.—
Chris Kenning,
USA Today,
8 Feb. 2026
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The crux of this formula is keratin, a protein shown to be vital to healthy and relatively more youthful nails.—
Tamim Alnuweiri,
InStyle,
7 Feb. 2026
Cite this Entry
“Compos mentis.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/compos%20mentis. Accessed 15 Feb. 2026.
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