1
: a product of living cells that circulates in body fluids (such as blood) or sap and produces a specific often stimulatory effect on the activity of cells usually remote from its point of origin
also
: a synthetic substance that acts like a hormone
2
Examples of hormone in a Sentence
Recent Examples on the Web
Manufactured since the 1940s to make products nonstick, stain-resistant and water-repellent, legacy PFAS have been linked to human cancer, obesity, thyroid disease, high cholesterol, decreased fertility, liver damage, hormone disruption and damage to the immune system, according to the EPA.
—
Sandee Lamotte, CNN Money, 9 June 2026
Omene plans to regularly measure blood samples and track changes in cancer markers, and biopsy participants' abdominal fat cells every six months, to see how those respond, in terms of hormones or inflammation.
—Yuki Noguchi, NPR, 9 June 2026
The new research suggests the biological reasons run deeper than the hormone itself.
—Allison Palmer, Fort Worth Star-Telegram, 8 June 2026
While semaglutide and tirzepatide – known by their brand names Ozempic and Mounjaro – curb appetite by mimicking one or two hormones, retatrutide also boosts a third that is believed to amplify its effect.
—Daniel Gilbert, CBS News, 8 June 2026
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Sandee Lamotte, CNN Money, 9 June 2026
Omene plans to regularly measure blood samples and track changes in cancer markers, and biopsy participants' abdominal fat cells every six months, to see how those respond, in terms of hormones or inflammation.
—Yuki Noguchi, NPR, 9 June 2026
The new research suggests the biological reasons run deeper than the hormone itself.
—Allison Palmer, Fort Worth Star-Telegram, 8 June 2026
While semaglutide and tirzepatide – known by their brand names Ozempic and Mounjaro – curb appetite by mimicking one or two hormones, retatrutide also boosts a third that is believed to amplify its effect.
—Daniel Gilbert, CBS News, 8 June 2026
See All Example Sentences for hormone
Cite this Entry
“Hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hormone. Accessed 12 Jun. 2026.
Copy CitationKids Definition
hormone
noun
hor·mone
ˈhȯr-ˌmōn 
: a product of living cells that circulates in body fluids (as blood) or sap and produces a specific and often stimulating effect on cells usually at a distance from the place where it is made
Medical Definition
hormone
noun
hor·mone
ˈhȯr-ˌmōn
1
a
: a product of living cells that circulates in body fluids (as blood) or sap and produces a specific often stimulatory effect on the activity of cells usually a distance from its point of synthesis
Some people develop insulin resistance, a condition in which response to the hormone is muted and the body must produce excess insulin to maintain healthy blood-glucose concentrations.—Ben Harder, Science News
Ben Harder, Science News
b
: a synthetic substance that acts like a hormone
2
: sex hormone
I discovered I had the classic signs of perimenopause, the prelude to "the change" when hormones yo-yo before menstrual periods cease altogether …—Beth Witrogen McLeod, Cooking Light
Beth Witrogen McLeod, Cooking LightLove words? Need even more definitions?
Merriam-Webster unabridged
