Found 2 items, similar to non compos mentis.
English → English (WordNet) Definition: non compos mentis non compos mentis adj : not of sound mind, memory, or understanding; in law, not competent to go to trial [syn: non compos mentis(p), of unsound mind(p)]
English → English (gcide) Definition: Non compos mentis Non compos \Non com"pos\ Non compos mentis \Non com“pos men”tis\ [L.] Not of sound mind; not having the regular use of reason; hence, also, as a noun, an idiot; a lunatic; one devoid of reason, either by nature or from accident. [1913 Webster]