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mental retardation

[ men-tl ree-tahr-dey-shuhn ]
/ ˈmɛn tl ˌri tɑrˈdeɪ ʃən /
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noun
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Origin of mental retardation

First recorded in1900–15

usage note for mental retardation

See retarded.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for mental retardation

mental retardation

noun
psychiatry the condition of having a low intelligence quotient (below 70)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for mental retardation

mental retardation

Below-average intellectual ability resulting from a genetic defect, brain injury, or disease, and usually present from birth or early infancy.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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