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
Kindness can lower cortisol, one of the hormones responsible for our fight-or-flight response.
—
Chris John Amorosino, Hartford Courant, 26 Mar. 2026
Many people are also hybrid types with different textures on different parts of the scalp, and those textures can shift over time with hormones, damage, and stress, according to Theradome.
—Allison Palmer, Miami Herald, 26 Mar. 2026
Interestingly, adding progesterone, a hormone released by the cells on a person’s eggs, to the uteruslike chamber helped the sperm better orient themselves under microgravity.
—Jackie Flynn Mogensen, Scientific American, 26 Mar. 2026
In addition to the nausea and vomiting, scientists speculate appetite loss is also due to systemic stress that throws off the hormones that regulate hunger.
—Brad Stulberg, Outside, 26 Mar. 2026
See All Example Sentences for hormone
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Chris John Amorosino, Hartford Courant, 26 Mar. 2026
Many people are also hybrid types with different textures on different parts of the scalp, and those textures can shift over time with hormones, damage, and stress, according to Theradome.
—Allison Palmer, Miami Herald, 26 Mar. 2026
Interestingly, adding progesterone, a hormone released by the cells on a person’s eggs, to the uteruslike chamber helped the sperm better orient themselves under microgravity.
—Jackie Flynn Mogensen, Scientific American, 26 Mar. 2026
In addition to the nausea and vomiting, scientists speculate appetite loss is also due to systemic stress that throws off the hormones that regulate hunger.
—Brad Stulberg, Outside, 26 Mar. 2026
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 Apr. 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
