1
: the hollow beneath the junction of the arm and shoulder
2
: the least desirable place : pit
77th Street Station … was the armpit of detective duty—
Joseph Wambaugh
Joseph WambaughExamples of armpit in a Sentence
a city described as the armpit of America
Recent Examples on the Web
Commonly, in adults, one defibrillator pad is placed on the right of the chest, just below the collarbone and the other on the lower left side, underneath the armpit.
—New Atlas, 24 Sep. 2024
Reagan was wounded when one of the bullets ricocheted off a limousine and struck him under the left armpit.
—Kanishka Singh and Mike Stone, USA TODAY, 17 Sep. 2024
The black plague killed about 25 million people in Europe during Middle Ages — and currently affects about five to 15 people each year in the U.S.
Symptoms include swollen lymph nodes in the groin, armpits, or neck; high fever; chills, and muscle cramps.
—Allison Futterman, Discover Magazine, 10 Sep. 2024
Near my armpit, sticking out under the skin, was what looked like a beer-bottle cap, a catheter implanted there at the start of treatment.
—Annie Ernaux, The New Yorker, 19 Aug. 2024
See all Example Sentences for armpit 
New Atlas, 24 Sep. 2024
Reagan was wounded when one of the bullets ricocheted off a limousine and struck him under the left armpit.
—Kanishka Singh and Mike Stone, USA TODAY, 17 Sep. 2024
The black plague killed about 25 million people in Europe during Middle Ages — and currently affects about five to 15 people each year in the U.S.
Symptoms include swollen lymph nodes in the groin, armpits, or neck; high fever; chills, and muscle cramps.
—Allison Futterman, Discover Magazine, 10 Sep. 2024
Near my armpit, sticking out under the skin, was what looked like a beer-bottle cap, a catheter implanted there at the start of treatment.
—Annie Ernaux, The New Yorker, 19 Aug. 2024
See all Example Sentences for armpit
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'armpit.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Armpit.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/armpit. Accessed 4 Oct. 2024.
Copy CitationKids Definition
armpit
noun
arm·pit
ˈärm-ˌpit 
: the hollow beneath the spot where the arm and shoulder join
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