underarm
noun
un·der·arm
ˈən-dər-ˌärm 
1
2
: the part of a garment that covers the underside of the arm
Examples of underarm in a Sentence
Recent Examples on the Web
Check the hidden spots: Ticks prefer warm, dark, and moist areas on your body, so be sure to focus on your hair, around your ears, underarms, groin, behind the knees, between your toes, and even your belly button.
—
Janet Loehrke, USA Today, 17 May 2026
Clothing that looks good on the hanger doesn’t always feel good on the body, especially when flare-prone areas like the underarms, inner thighs and beneath the breasts are involved.
—Lauryn Higgins, Flow Space, 6 May 2026
Focus on the scalp, behind the ears, underarms, belly button, behind the knees, between the legs and the back of the neck.
—Allison Palmer, Sacbee.com, 15 Apr. 2026
There is fatigue, too, for those still having to make the argument that underarm serves are anything but underhand.
—Charlie Eccleshare, New York Times, 15 Apr. 2026
See All Example Sentences for underarm
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Janet Loehrke, USA Today, 17 May 2026
Clothing that looks good on the hanger doesn’t always feel good on the body, especially when flare-prone areas like the underarms, inner thighs and beneath the breasts are involved.
—Lauryn Higgins, Flow Space, 6 May 2026
Focus on the scalp, behind the ears, underarms, belly button, behind the knees, between the legs and the back of the neck.
—Allison Palmer, Sacbee.com, 15 Apr. 2026
There is fatigue, too, for those still having to make the argument that underarm serves are anything but underhand.
—Charlie Eccleshare, New York Times, 15 Apr. 2026
See All Example Sentences for underarm
Cite this Entry
“Underarm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underarm. Accessed 10 Jun. 2026.
Copy CitationKids Definition
underarm
1 of 3 adjective
un·der·arm
ˌən-də-ˌrärm
1
: underhand entry 2 sense 2
an underarm toss
2
: placed under or on the underside of the arm
underarm seams
underarm
2 of 3 adverb
un·der·arm
ˌən-də-ˈrärm
: with an underarm motion
underarm
3 of 3 noun
un·der·arm
ˈən-də-ˌrärm
1
: armpit
2
: the part of a garment that covers the underside of the arm
Medical Definition
underarm
noun
un·der·arm
ˈən-dər-ˌärm
: armpit
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