1. mentally retarded - Noun
2. mentally retarded - Adjective
people collectively who are mentally retarded
Source: WordNethe started a school for the retarded Source: Internet
The men and women are elderly, mentally ill or mentally retarded -- Arkansans who through time or circumstance cannot take care of themselves. Source: Internet
Writing for the majority, Justice John Paul Stevens said a national consensus has emerged in recent years against executing the mentally retarded. Source: Internet