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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Officials said Kuwait’s electricity and water systems remain stable and contingency plans had been activated to ensure continued supply, according to the statement.—
Anniek Bao,
CNBC,
30 Mar. 2026
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Officials said injury statuses ranged from stable to critical.—
Garrett Behanna,
CBS News,
30 Mar. 2026
Adjective
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Its elegant, rounded boxes for column and row numbers and lucid formula-building bar are wonders to behold.—
Edward Mendelson,
PC Magazine,
19 Mar. 2026
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But his lucid, sensitive evocations of Blume’s suburban girlhood should put the question of his ability to rest.—
Katy Waldman,
New Yorker,
18 Mar. 2026
Adjective
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Erwin Chemerinsky, dean of the UC Berkeley School of Law, said Trump’s attempts to bypass the normal confirmation processes are unconstitutional.—
Kevin Rector,
Los Angeles Times,
4 Apr. 2026
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According to the study, it is encoded in the internal structure of the remnant through what physicists call quasi-normal modes.—
Rupendra Brahambhatt,
Interesting Engineering,
4 Apr. 2026
Adjective
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The potatoes were well balanced in their level of fried-ness, and the English muffin was nice and fluffy.—
Cooper Worth,
Des Moines Register,
1 Apr. 2026
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But in the 1980s, the Communist Party developed a system of government that orchestrated regular transitions of power, balanced rival interests, encouraged policy discussion, and implemented bold economic reforms.—
Michael Schuman,
The Atlantic,
1 Apr. 2026
Adjective
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The lawsuit claims that Missouri lawmakers used no rational basis to categorize which counties qualified for a 5% cap, a freeze or neither.—
Jenna Ebbers,
Kansas City Star,
4 Apr. 2026
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When medicated, Lofton is thoughtful and rational, just like in years past, his mother said.—
Matthew Adams,
Fort Worth Star-Telegram,
3 Apr. 2026
Adjective
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But his family says Ty was perfectly healthy before suddenly dying.—
Peter Van Sant,
CBS News,
5 Apr. 2026
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Kailer Yamamoto and Liam O’Brien, who was in the lineup after 18 games as a healthy scratch, also scored for the Mammoth, who won their fourth straight road game.—
ABC News,
ABC News,
5 Apr. 2026
Cite this Entry
“Compos mentis.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/compos%20mentis. Accessed 6 Apr. 2026.
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