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Diminished, damaged, or weakened: an impaired sense of smell.
(adjective)
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Functioning poorly or incompetently: a driver so tired as to be impaired.
(adjective)
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Having a physical or mental disability: an impaired child in need of special assistance.
(adjective)
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People who have a physical or mental disability considered as a group: a swimming class for the physically impaired.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.