Noah Webster's New International Dictionary of the English Language

1. (n.) A man in private station, as distinguished from one holding a public office.

2. (n.) An unlearned, ignorant, or simple person, as distinguished from the educated; an ignoramus.

3. (n.) 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.

4. (n.) A fool; a simpleton; -- a term of reproach.