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
How Social Ties Affect Biological Markers of Aging Participants provided blood and urine samples so that researchers could measure cellular aging, inflammation, and hormone levels tied to stress.
—
Rob Williams, EverydayHealth.com, 7 Oct. 2025
Normally, a rise in cortisol levels causes the body to slow down stress hormone activity.
—Lauren O'Connor, Health, 7 Oct. 2025
Phthalates and bisphenols, both of which can wreak damage on the hormone system, have a slew of negative health impacts, according to a large and growing body of science.
—Laura Paddison, CNN Money, 7 Oct. 2025
Bone density naturally peaks in our 20s and starts to decline by our 30s, and that decline is slow at first but accelerates as hormones shift.
—Lauryn Higgins, Time, 6 Oct. 2025
See All Example Sentences for hormone
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Rob Williams, EverydayHealth.com, 7 Oct. 2025
Normally, a rise in cortisol levels causes the body to slow down stress hormone activity.
—Lauren O'Connor, Health, 7 Oct. 2025
Phthalates and bisphenols, both of which can wreak damage on the hormone system, have a slew of negative health impacts, according to a large and growing body of science.
—Laura Paddison, CNN Money, 7 Oct. 2025
Bone density naturally peaks in our 20s and starts to decline by our 30s, and that decline is slow at first but accelerates as hormones shift.
—Lauryn Higgins, Time, 6 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 13 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?
Merriam-Webster unabridged
Share