✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

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.
Hearing Loss Once viewed as a quality-of-life issue, untreated hearing loss is now recognized as a powerful and preventable dementia risk factor. Melissa Fleur Afshar, MSNBC Newsweek, 3 Dec. 2025 This is important because being overweight or having obesity is a serious risk factor for high cholesterol and heart disease. Carrie Madormo, Verywell Health, 30 Nov. 2025 Advertisement The greatest risk factor for any type of stroke is hypertension, also known as high blood pressure, Willey says. Dominique Mosbergen, Time, 25 Nov. 2025 An older-looking brain is a top risk factor for developing Alzheimer’s disease and other forms of dementia, said Raji. Kayla Hayempour, NBC news, 24 Nov. 2025 See All Example Sentences for risk factor

Word History

First Known Use

1907, in the meaning defined above

Time Traveler
The first known use of risk factor was in 1907

Browse Nearby Words

Cite this Entry

“Risk factor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/risk%20factor. Accessed 5 Dec. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!