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  1. weakened, diminished, or damaged: impaired hearing; to rebuild an impaired bridge.
  2. functioning poorly or inadequately: Consumption of alcohol results in an impaired driver.
  3. deficient or incompetent (usually preceded by an adverb or noun): morally impaired; sports-impaired.

Origin of impaired

Related formsun·im·paired, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unimpaired

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British Dictionary definitions for unimpaired


  1. not reduced or weakened in strength, quality, etc
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

Word Origin and History for unimpaired


1580s, from un- (1) "not" + past participle of impair. Rare before c.1760.

Online Etymology Dictionary, © 2010 Douglas Harper