: a person who does not smoke tobacco : a person who is not a smoker
Radon poisoning is the leading cause of lung cancer in nonsmokers, according to the Environmental Protection Agency.—Jonathan Scholles
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This difference in the type of mutations may be one reason lung cancer among people under 50 is more prevalent among nonsmokers than smokers.—Nina Agrawal, New York Times, 22 July 2025 However, the endothelial cells incubated in serum from marijuana smokers released 27% less nitric oxide than those treated with blood from nonsmokers.—Sandee Lamotte, CNN Money, 28 May 2025 For example: How does the life expectancy of smokers and nonsmokers differ?—Manon Bischoff, Scientific American, 23 May 2025 However, those who quit by age 30 had the same life expectancy as a nonsmoker.—Scott Lafee, San Diego Union-Tribune, 24 June 2025 See All Example Sentences for nonsmoker
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