: being in an imperfect or weakened state or condition: such as
a
: diminished in function or ability : lacking full functional or structural integrity
Brennan supports the use of corticosteroids in the treatment of inflammation, swelling, pain and impaired joint movement.—Stan Bergstein
Finding jobs can be difficult for visually impaired adults. About 70 percent of them are unemployed, the National Federation of the Blind says.—Eric Aasen
… some GERD patients have impaired gut motility, meaning that their stomachs empty too slowly.—Andrew Weil
b
: unable to function normally or safely (as when operating a motor vehicle) because of intoxication by alcohol or drugs
Drive Sober or Get Pulled Over is the safety advertisement that restaurants and bars will use to remind patrons of the dangers of driving impaired.—Mati Spencer
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Merriam-Webster unabridged
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