Definition of compos mentis in US English:

compos mentis


  • predicative Having full control of one's mind; sane.

    ‘are you sure he was totally compos mentis?’
    • ‘Even though anyone still living who saw them play is probably not adequately compos mentis to remember the occasion.’
    sensible, well adjusted, reasonable, rational, level-headed, sound, practical, discerning, logical, able to think clearly, lucid, clear-headed, coherent
    View synonyms


Early 17th century: Latin.


compos mentis

/ˌkämpəs ˈmen(t)əs//ˌkɑmpəs ˈmɛn(t)əs/