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
Inspect your dog after every outing, checking the ears, armpits and gaps between the toes, and pull any tick out whole with tweezers.
—
Ryan Brennan,
Miami Herald,
2 July 2026
Small fingertip circles at the armpits and groin crease open the body’s two largest drainage clusters before movement begins.
—
Allison Palmer,
Charlotte Observer,
29 June 2026
Light fingertip circles at the armpits and groin crease open the two largest drainage clusters in the body before movement begins.
—
Allison Palmer,
Kansas City Star,
29 June 2026
Symptoms of lobular breast cancer include breast pain or warmth, breast skin that looks or feels thicker than usual, skin that has dimples, tiny dents, or puckers and a lump near your armpit, according to the Cleveland Clinic.
—
Gina Kalsi,
PEOPLE,
26 June 2026
See All Example Sentences for armpit
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Ryan Brennan,
Miami Herald,
2 July 2026
Small fingertip circles at the armpits and groin crease open the body’s two largest drainage clusters before movement begins.
—
Allison Palmer,
Charlotte Observer,
29 June 2026
Light fingertip circles at the armpits and groin crease open the two largest drainage clusters in the body before movement begins.
—
Allison Palmer,
Kansas City Star,
29 June 2026
Symptoms of lobular breast cancer include breast pain or warmth, breast skin that looks or feels thicker than usual, skin that has dimples, tiny dents, or puckers and a lump near your armpit, according to the Cleveland Clinic.
—
Gina Kalsi,
PEOPLE,
26 June 2026
See All Example Sentences for armpit
Cite this Entry
“Armpit.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/armpit. Accessed 5 Jul. 2026.
Copy CitationKids Definition
armpit
noun
arm·pit
ˈärm-ˌpit 
: the hollow beneath the spot where the arm and shoulder join
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