What is the meaning of mentally retarded?

People collectively who are mentally retarded.
- usage: "he started a school for the retarded"
- synonyms: retarded, developmentally challenged

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APA	WordNet. (2010). mentally retarded. Retrieved September 20, 2026, from http://smartdefine.org/mentally_retarded/definitions/1222266
Chicago	WordNet. 2010. "mentally retarded" http://smartdefine.org/mentally_retarded/definitions/1222266 (accessed September 20, 2026).
Harvard	WordNet 2010, mentally retarded, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/mentally_retarded/definitions/1222266>.
MLA	WordNet. "mentally retarded" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/mentally_retarded/definitions/1222266>

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