‖pos>a. [ L. ] (Law) Sane in mind; being of sound mind, memory, and understanding. [ Webster 1913 Suppl. ]
{ ‖ ‖ } [ 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 ]