risk factor

noun

: something that increases risk or susceptibility

Examples of risk factor in a Sentence

Age is one of the risk factors for this disease.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Unsurprisingly, stress has negative impacts on heart function and is a risk factor for heart disease. Sandra Rose Salathe, Flow Space, 29 Oct. 2025 About 70 percent of the women in the study have undetected sleep apnea, a significant discovery since untreated sleep apnea is a risk factor for cognitive decline. Barbara Bry, San Diego Union-Tribune, 26 Oct. 2025 Obesity is another important colon cancer risk factor. Bryant Stamford, Louisville Courier Journal, 23 Oct. 2025 Dense breast tissue, which is a risk factor for developing cancer, makes mammograms harder to interpret. Elizabeth Cohen, NBC news, 22 Oct. 2025 See All Example Sentences for risk factor

Word History

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of risk factor was in 1949

Browse Nearby Words

Cite this Entry

“Risk factor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/risk%20factor. Accessed 5 Nov. 2025.

Kids Definition

risk factor

noun
: something that increases the possibility that something bad will happen
cigarette smoking is a risk factor for lung cancer

Medical Definition

risk factor

noun
: something that increases risk or susceptibility
poorly controlled hypertension is a risk factor for coronary heart disease

More from Merriam-Webster on risk factor

Last Updated: - Updated example sentences
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