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
This enzyme helps regulate how fat tissue responds to glucocorticoids (a type of catabolic hormone).
—
Dan Perry, Newsweek, 28 Feb. 2025
Luteinizing hormone-releasing hormones (LHRHs): These agents prevent your ovaries from producing estrogen.
—Carrie Madormo, Rn, Health, 27 Feb. 2025
It’s made with ingredients that help reduce inflammation, boost your body’s natural stress response, protect cells from damage caused by free radicals, and counteract the effects of DHT—a hormone that can shrink hair follicles and contribute to hair loss.
—Megan McIntyre, Allure, 26 Feb. 2025
Many forms of hormonal birth control, including the oral contraceptive pill, have a combination of hormones: estrogen and progestin (a form of progesterone).
—Mara Santilli, Flow Space, 26 Feb. 2025
See All Example Sentences for hormone
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Dan Perry, Newsweek, 28 Feb. 2025
Luteinizing hormone-releasing hormones (LHRHs): These agents prevent your ovaries from producing estrogen.
—Carrie Madormo, Rn, Health, 27 Feb. 2025
It’s made with ingredients that help reduce inflammation, boost your body’s natural stress response, protect cells from damage caused by free radicals, and counteract the effects of DHT—a hormone that can shrink hair follicles and contribute to hair loss.
—Megan McIntyre, Allure, 26 Feb. 2025
Many forms of hormonal birth control, including the oral contraceptive pill, have a combination of hormones: estrogen and progestin (a form of progesterone).
—Mara Santilli, Flow Space, 26 Feb. 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 4 Mar. 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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