George Bernard Shaw
Usage of Idiot
The terms idiot, imbecile, moron, and their derivatives were formerly used as technical descriptors in medical, educational, and regulatory contexts. These uses were broadly rejected by the close of the 20th century and are now considered offensive.
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Idiot Has Greek Roots
The Greek adjective idios means “one’s own” or “private.” The derivative noun idiōtēs means “private person.” A Greek idiōtēs was a person who was not in the public eye, who held no public office. From this came the sense “common man,” and later “ignorant person”—a natural extension, for the common people of ancient Greece were not, in general, particularly learned. The English idiot originally meant “ignorant person,” but the more usual reference now is to a person who lacks basic intelligence or common sense rather than education.
Cite this Entry
“Idiot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiot. Accessed 30 Oct. 2025.
Copy CitationKids Definition
Medical Definition
idiot
noun
Usage of Idiot
The terms idiot, imbecile, moron, and their derivatives were formerly used as technical descriptors in medical, educational, and regulatory contexts. These uses were broady rejected by the close of the 20th century and are now considered offensive.
Legal Definition
idiot
noun
Note: While the terms idiot, imbecile, and moron survive in many state codes and statutes, they are generally no longer used in both medical and legal contexts. The modern terminology distinguishes between mild, moderate, severe, and profound levels of disability. Historically persons with intellectual disabilities have been deprived of certain rights (as in not being allowed to vote). Generally today, an adult with an intellectual disability who is his or her own guardian is not deprived of these rights.
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