1
: the protuberance of a mammary gland upon which in the female the lactiferous ducts open and from which milk is drawn
2
a
: an artificial teat through which a bottle-fed infant nurses
b
: a device with an orifice through which the discharge of a liquid can be regulated
3
a
: a protuberance resembling or suggesting the nipple of a breast
b
: a small projection through which oil or grease is injected into machinery
4
: a pipe coupling consisting of a short piece of threaded tubing
Examples of nipple in a Sentence
Recent Examples on the Web
Look for swelling, rashes, visible lumps or if the nipple has been pulled in.
—
Melissa Fleur Afshar, MSNBC Newsweek, 30 Oct. 2025
Finally, pay attention to changes in your breasts, such as thickening, swelling, nipple discharge, different colors or new areas of fullness, and seek medical evaluation as soon as something looks or feels different.
—Faye Chiu, CNN Money, 22 Oct. 2025
Ductal carcinoma tumors grow outside milk ducts, the tubes that connect the glands to the nipple.
—Emily Kay Votruba, EverydayHealth.com, 21 Oct. 2025
When a patient comes in for Preservé, their surgeon takes measurements, including the width of the breasts and the distance from nipple to nipple, and plugs the data into a three-dimensional imaging system, which returns a specific range of implants that will fit the person’s chest.
—Jolene Edgar, Allure, 15 Oct. 2025
See All Example Sentences for nipple
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Melissa Fleur Afshar, MSNBC Newsweek, 30 Oct. 2025
Finally, pay attention to changes in your breasts, such as thickening, swelling, nipple discharge, different colors or new areas of fullness, and seek medical evaluation as soon as something looks or feels different.
—Faye Chiu, CNN Money, 22 Oct. 2025
Ductal carcinoma tumors grow outside milk ducts, the tubes that connect the glands to the nipple.
—Emily Kay Votruba, EverydayHealth.com, 21 Oct. 2025
When a patient comes in for Preservé, their surgeon takes measurements, including the width of the breasts and the distance from nipple to nipple, and plugs the data into a three-dimensional imaging system, which returns a specific range of implants that will fit the person’s chest.
—Jolene Edgar, Allure, 15 Oct. 2025
See All Example Sentences for nipple
Cite this Entry
“Nipple.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nipple. Accessed 4 Nov. 2025.
Copy CitationKids Definition
nipple
noun
nip·ple
ˈnip-əl 
1
: the small protruding part of the gland that in females produces milk and from which a baby or young mammal sucks milk
2
: something resembling a nipple
especially
: the mouthpiece of a bottle from which an infant feeds
Medical Definition
nipple
noun
nip·ple
ˈnip-əl
1
: the protuberance of a mammary gland upon which in the female the lactiferous ducts open and from which milk is drawn
2
a
: an artificial teat through which a bottle-fed infant nurses
b
: a device with an orifice through which the discharge of a liquid can be regulated
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