to make or cause to become worse; diminish in ability, value, excellence, etc.; weaken or damage: to impair one's health; to impair negotiations.
to grow or become worse; lessen.
- im·pair·a·ble, adjective
- im·pair·er, noun
- im·pair·ment, noun
- non·im·pair·ment, noun
- pre·im·pair·ment, noun
- self-im·pair·a·ble, adjective
- self-im·pair·ing, adjective
- un·im·pair·a·ble, adjective
Other definitions for impair (2 of 2)
noting any odd number, especially in roulette.
- Compare pair.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use impair in a sentence
Instead, it’s more consistent with the idea that repeated cold exposure might actually impair your toes’ ability to handle the cold.
A smart pill detects an athlete’s body temperature and transmits it to an external device, so coaches can look for spikes that might impair performance.As biometrics boom, who owns athletes’ data? It depends on the sport. | Nick Busca | February 2, 2021 | Washington Post
Another study from 2017 had athletes eat a low-carb diet for three weeks and found that it impaired performance by reducing exercise efficiency.
Alterations to hotels, public buildings and transport hubs prepared Tokyo not only for physically impaired Paralympic athletes and fans, but also for the creaking limbs of its own population, the world’s oldest.Can Tokyo Safely Host the Olympic Games This Summer? | Charlie Campbell | January 12, 2021 | Time
Stress actually impairs the body’s ability to repair itself.
Formerly to impair the morals was a minor was a punishable offense.Holy Homophobia, Batman! A Queer Reading of the Dark Knight | Rich Goldstein | July 26, 2014 | THE DAILY BEAST
In other words, researchers were able to prove that THC should, technically, impair driving, but not that it does.
Does Ambien impair judgment enough to drive one to violent crime?
A host of environmental influences more directly impair brain functioning in a way that predisposes to violence.
But recent research indicates that stress-inducing measures can actually impair memory.New Research Suggests Enhanced Interrogation Not Effective | R.M. Schneiderman | May 25, 2012 | THE DAILY BEAST
They can never be taken from the capital, for this would impair it and, if continued, result in the insolvency of the corporation.Putnam's Handy Law Book for the Layman | Albert Sidney Bolles
Such history never loses its interest, nor does the lapse of ages, in the least degree, impair its credibility.Gospel Philosophy | J. H. Ward
Yes, there is that unchangeable oval cut of face, those features which time will never impair, that graceful and thoughtful brow.The Petty Troubles of Married Life, Complete | Honore de Balzac
That the acts in question impair this contract, has already been sufficiently shown.Select Speeches of Daniel Webster | Daniel Webster
They impair and take away the charter; and they appropriate the property to new uses, against their consent.Select Speeches of Daniel Webster | Daniel Webster
British Dictionary definitions for impair
(tr) to reduce or weaken in strength, quality, etc: his hearing was impaired by an accident
- impairable, adjective
- impairer, noun
- impairment, noun
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