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
The diversity of hormone function, from milk to mood, hunger to height, does not occur through the action of any single part of our anatomy.
—
Literary Hub, 20 May 2026
Per the American Heart Association’s scientific statement on circadian health, the body’s internal clock regulates cellular repair, hormone release and immune function on a precise schedule — and irregular timing throws that schedule off regardless of how many total hours are logged.
—Allison Palmer, Charlotte Observer, 19 May 2026
Today’s offerings target specific life stages — midlife transitions, hormone health, menopause — alongside broader goals like creativity, reflection and reconnection.
—Lauren Schuster, Sacbee.com, 19 May 2026
The practice grew beyond surgery into peptides, hyperbaric therapy, diagnostics, hormone care, supplements and recovery services.
—Ryma Chikhoune, Footwear News, 19 May 2026
See All Example Sentences for hormone
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Literary Hub, 20 May 2026
Per the American Heart Association’s scientific statement on circadian health, the body’s internal clock regulates cellular repair, hormone release and immune function on a precise schedule — and irregular timing throws that schedule off regardless of how many total hours are logged.
—Allison Palmer, Charlotte Observer, 19 May 2026
Today’s offerings target specific life stages — midlife transitions, hormone health, menopause — alongside broader goals like creativity, reflection and reconnection.
—Lauren Schuster, Sacbee.com, 19 May 2026
The practice grew beyond surgery into peptides, hyperbaric therapy, diagnostics, hormone care, supplements and recovery services.
—Ryma Chikhoune, Footwear News, 19 May 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 20 May. 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
