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
Take Oral Contraceptives Taking a daily dose of oral contraceptives (birth control pills) may help pores appear smaller by helping to decrease the hormones that can cause acne and facial oiliness.8
Oral contraceptives can take as little as one cycle (a month) to affect the skin.
—
Laura Schober, Health, 23 Jan. 2025
Focus on Hormone Health Hormone health is poised to become a major focus in 2025 as more people recognize the profound impact hormones have on every aspect of well-being.
—Sandra Rose Salathe, Flow Space, 21 Jan. 2025
No One Knows How to Talk About Weight Loss Anymore
Many tissues in the body have receptors for GLP-1, a hormone, which explains its multiplicity of health effects.
—Alice Park, TIME, 21 Jan. 2025
Some believe fizzy water may increase weight, pointing to a February 2017 study that found carbonated beverages stimulate appetite by increasing ghrelin, the hunger hormone.
—Sandee Lamotte, CNN, 21 Jan. 2025
See all Example Sentences for hormone 
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Laura Schober, Health, 23 Jan. 2025
Focus on Hormone Health Hormone health is poised to become a major focus in 2025 as more people recognize the profound impact hormones have on every aspect of well-being.
—Sandra Rose Salathe, Flow Space, 21 Jan. 2025
No One Knows How to Talk About Weight Loss Anymore
Many tissues in the body have receptors for GLP-1, a hormone, which explains its multiplicity of health effects.
—Alice Park, TIME, 21 Jan. 2025
Some believe fizzy water may increase weight, pointing to a February 2017 study that found carbonated beverages stimulate appetite by increasing ghrelin, the hunger hormone.
—Sandee Lamotte, CNN, 21 Jan. 2025
See all Example Sentences for hormone
Dictionary Entries Near hormone
Cite this Entry
“Hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hormone. Accessed 30 Jan. 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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