stressor

noun

stress·​or ˈstre-sər How to pronounce stressor (audio) -ˌsȯr How to pronounce stressor (audio)
: a stimulus that causes stress

Examples of stressor in a Sentence

Credit card debt is a major stressor in her life.
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.
Rice bran oil softens and conditions skin, while vitamin E provides antioxidant protection against environmental stressors. Jailynn Taylor, Allure, 10 May 2026 On days with heavy wildfire smoke from Canada, Tummala said her patients experience the miserable effects of multiple respiratory stressors. Keerti Gopal, ArsTechnica, 8 May 2026 Cortisol Awakening Response as a Biomarker A 2025 study confirmed CAR as a viable biomarker for HPA axis function and found that life stressors and chronic stress meaningfully alter individual cortisol patterns. Allison Palmer, Fort Worth Star-Telegram, 6 May 2026 Stressed plants are far more susceptible to this disease, so begin to control it by removing the stressors. Tim Johnson, Chicago Tribune, 3 May 2026 See All Example Sentences for stressor

Word History

First Known Use

1950, in the meaning defined above

Time Traveler
The first known use of stressor was in 1950

Browse Nearby Words

Cite this Entry

“Stressor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stressor. Accessed 14 May. 2026.

Medical Definition

stressor

noun
stress·​or ˈstres-ər How to pronounce stressor (audio) -ˌȯ(ə)r How to pronounce stressor (audio)
: a stimulus that causes stress
psychological stressors
Love words? Need even more definitions?

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

More from Merriam-Webster