compos mentis

adjective
com·​pos men·​tis | \ˈkäm-pəs-ˈmen-təs \

Definition of compos mentis 

: of sound mind, memory, and understanding

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Examples of compos mentis in a Sentence

went to court to prove that her grandmother was no longer compos mentis and needed a legal guardian

Recent Examples on the Web

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, "Trump’s Deals Keep Falling Apart Because He Can’t Speak for His Own Administration," 10 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'compos mentis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of compos mentis

1616, in the meaning defined above

History and Etymology for compos mentis

Latin, literally, having mastery of one's mind

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The first known use of compos mentis was in 1616

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More Definitions for compos mentis

compos mentis

adjective
com·​pos men·​tis | \ˌkäm-pə-ˈsment-əs \

Medical Definition of compos mentis 

: of sound mind, memory, and understanding

compos mentis

adjective
com·​pos men·​tis | \ˈkäm-pəs-ˈmen-təs, ˈkȯm-pȯs-ˈmen-tis \

Legal Definition of compos mentis 

History and Etymology for compos mentis

Latin, literally, having possession of one's mind

More from Merriam-Webster on compos mentis

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Thesaurus: All synonyms and antonyms for compos mentis

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