Mental \Men"tal\, a. [F., fr. L. mentalis, fr. mens, mentis, the mind; akin to E. mind. See {Mind}.] Of or pertaining to the mind; intellectual; as, mental faculties; mental operations, conditions, or exercise. What a mental power This eye shoots forth! --Shak. {Mental alienation}, insanity. {Mental arithmetic}, the art or practice of solving arithmetical problems by mental processes, unassisted by written figures.