idiot

The definition of an idiot is a fool or stupid person.

(noun)

An example of an idiot is a person who thinks it's safe to play in traffic.

See idiot in Webster's New World College Dictionary

noun

Origin: ME idiote < OFr < L idiota, ignorant and common person < Gr idiōtēs, layman, ignorant person < idios, one's own, peculiar: see idio-

See idiot in American Heritage Dictionary 4

noun

A foolish or stupid person.
A person of profound mental retardation having a mental age below three years and generally being unable to learn connected speech or guard against common dangers. The term belongs to a classification system no longer in use and is now considered offensive.

Origin:

Origin: Middle English, ignorant person

Origin: , from Old French idiote

Origin: , from Latin idiōta

Origin: , from Greek idiōtēs, private person, layman

Origin: , from idios, own, private; see s(w)e- in Indo-European roots

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