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 (ā-mĕn′shə, -shē-ə)
Severe intellectual disability. This term belongs to a classification system no longer in use.

[Latin āmentia, mental derangement, from āmēns, āment-, out of one's mind, mentally deranged : ā-, ab-, out of; see ab-1 + mēns, mind; see men- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Medicine) severe mental deficiency, usually congenital. Compare dementia
[C14: from Latin: insanity, from āmēns mad, from mēns mind]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(eɪˈmɛn ʃə, əˈmɛn-)

severe mental retardation.
[1350–1400; < Latin, =āment-, s. of āmēns mad (ā- a-4 + mēns mind) + -ia -ia]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


1. a congenital condition of low intelligence.
2. a form of temporary insanity. Cf. dementia.
See also: Insanity
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amentia - extreme mental retardation
backwardness, mental retardation, subnormality, slowness, retardation - lack of normal development of intellectual capacities
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