A man in private station, as distinguished from one holding a public office.
An unlearned, ignorant, or simple person, as distinguished from the educated; an ignoramus.
A human being destitute of the ordinary intellectual powers, whether congenital, developmental, or accidental; commonly, a person without understanding from birth; a natural fool; a natural; an innocent.
This life, which had been the tomb of his virtue and of his honour, is but a walking shadow; a poor player, that struts and frets his hour upon the stage, and then is heard no more: it is a tale told by an idiot, full of sound and fury, signifying nothing. William Shakespeare