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
Pregnancy is another major trigger, as the growing uterus puts pressure on pelvic veins and pregnancy hormones relax blood vessel walls.
—
Daryl Austin, USA Today, 21 Oct. 2025
For hormone-receptor–positive cancers—the most common type in midlife women—CDK inhibitors like palbociclib, ribociclib and abemaciclib have been game-changing.
—Lauryn Higgins, Flow Space, 21 Oct. 2025
These poly- and monounsaturated fats can slow digestion and trigger hormones that promote satiety.
—Allison Forsyth, Health, 21 Oct. 2025
Traditionally, hormone therapeutic leuprolide is prescribed to treat recurrent prostate cancer – something indicated by elevated levels of prostate specific antigen (PSA) following initial treatment.
—New Atlas, 20 Oct. 2025
See All Example Sentences for hormone
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Daryl Austin, USA Today, 21 Oct. 2025
For hormone-receptor–positive cancers—the most common type in midlife women—CDK inhibitors like palbociclib, ribociclib and abemaciclib have been game-changing.
—Lauryn Higgins, Flow Space, 21 Oct. 2025
These poly- and monounsaturated fats can slow digestion and trigger hormones that promote satiety.
—Allison Forsyth, Health, 21 Oct. 2025
Traditionally, hormone therapeutic leuprolide is prescribed to treat recurrent prostate cancer – something indicated by elevated levels of prostate specific antigen (PSA) following initial treatment.
—New Atlas, 20 Oct. 2025
See All Example Sentences for hormone
Cite this Entry
“Hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hormone. Accessed 22 Oct. 2025.
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?
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