Dictionary
id•i•ot
Pronunciation: (id'ē-ut), [key]—
n.
1. an utterly foolish or senseless person.
2. Psychol.a person of the lowest order in a former classification of mental retardation, having a mental age of less than three years old and an intelligence quotient under 25.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.