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
These drugs, which mimic a natural gut hormone called GLP-1 (glucagon-like peptide-1), are primarily used for type 2 diabetes and weight management.
—
Angelica Stabile, FOXNews.com, 31 Dec. 2025
Sleep regulates various hormones, including insulin, which is responsible for maintaining your blood sugar levels.
—Sohaib Imtiaz, Verywell Health, 31 Dec. 2025
Plus, the blue light our devices emit suppresses melatonin, the hormone connected to sleep regulation.
—Vicki Salemi, Boston Herald, 29 Dec. 2025
People who are able to quit in an effective way—by abandoning goals that no longer work and finding new ones that work better—tend to be more content with their lives, less anxious, and have decreased stress hormones.
—Nicholas Wright, Time, 28 Dec. 2025
See All Example Sentences for hormone
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Angelica Stabile, FOXNews.com, 31 Dec. 2025
Sleep regulates various hormones, including insulin, which is responsible for maintaining your blood sugar levels.
—Sohaib Imtiaz, Verywell Health, 31 Dec. 2025
Plus, the blue light our devices emit suppresses melatonin, the hormone connected to sleep regulation.
—Vicki Salemi, Boston Herald, 29 Dec. 2025
People who are able to quit in an effective way—by abandoning goals that no longer work and finding new ones that work better—tend to be more content with their lives, less anxious, and have decreased stress hormones.
—Nicholas Wright, Time, 28 Dec. 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 1 Jan. 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
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