un·​der·​arm | \ ˈən-dər-ˈärm \

Definition of underarm

 (Entry 1 of 3)

1 British : underhand sense 3
2 : placed under or on the underside of the arm underarm seams


un·​der·​arm | \ ˌən-dər-ˈärm \

Definition of underarm (Entry 2 of 3)


un·​der·​arm | \ ˈən-dər-ˌärm \

Definition of underarm (Entry 3 of 3)

2 : the part of a garment that covers the underside of the arm

Examples of underarm in a Sentence


He threw the ball underarm.

Recent Examples on the Web: Adjective

At Degree, scientists work to calibrate the formula of different products to meet specific needs, such as smelling fresh or protecting against yellow underarm stains. Cassie Shortsleeve, Popular Mechanics, "How Scientists at Degree Men Test Antiperspirant," 20 Dec. 2018 Now, Bella is opening up about who inspires another one of her signature trends: rocking her underarm hair. Isabella Gomez, Teen Vogue, "Bella Thorne Posts Photos of Julia Roberts and Madonna Rocking Armpit Hair," 18 Nov. 2018 Getting a quick wax every month or so can keep your underarm hair at bay without reaching for the razor every morning. Sam Escobar, Good Housekeeping, "Your Ultimate Body Hair Removal Guide," 17 July 2018 Roberts infamous showing of underarm fuzz may not have been designed to shake up society's standards of female beauty. Lauren Valenti, Vogue, "Julia Roberts' Infamous Armpit Hair Reveal Was a Statement—But Not the One You Think," 5 Nov. 2018 If hair-removal is on your mind this summer, there's a lot to go over: underarm fuzz, coarse arm hair, leg stubble, the bikini area and more. Sam Escobar, Good Housekeeping, "Your Ultimate Body Hair Removal Guide," 17 July 2018 Bill Elder, a tall skinny boy with big ears and acne, seemed to have a disinclination to shower, or wear deodorant when his underarm hair had begun to grow and his armpits to smell like a nervous adult's. Michael Lindsay-hogg, Town & Country, "Brando in a Blue Blazer," 22 Aug. 2013 Another in-office option is MiraDry, a device that uses energy to destroy sweat glands after the patient's underarm area is numbed. Marci Robin, Allure, "The FDA Has Approved Qbrexza Cloths to Treat Excessive Underarm Sweating," 2 July 2018 The Food and Drug Administration has approved a topical wipe that can help curtail excessive underarm sweating, the company behind the product announced Friday. Jamie Ducharme, Time, "The FDA Approved a Topical Treatment for Excessive Underarm Sweating," 30 June 2018

Recent Examples on the Web: Noun

Down that peeks out from underarms and covers legs seems to be going mainstream. Maya Singer, Vogue, "To Shave, or Not to Shave? How a New Generation of Women Are Embracing Body Hair," 10 Dec. 2018 The condition causes painful abscesses and boils to occur near hair follicles, such as the underarms and groin. Allyson Byers, SELF, "I Have a Rare, Chronic Skin Condition, and I Went to Questionable Lengths Looking for a Cure," 1 June 2018 But there are certain areas of your body — like your pubic hair and underarms — that naturally give off a stronger scent than your hair, chest, and back. Samantha Lefave, Redbook, "Why You Should Never Ignore Sweet-Smelling Urine (or These Other Body Odors)," 3 Aug. 2018 What's more: A recent study found that nearly one in four women under the age of 25 have stopped shaving their underarms. Lauren Valenti, Vogue, "Julia Roberts' Infamous Armpit Hair Reveal Was a Statement—But Not the One You Think," 5 Nov. 2018 My dresser drawers became filled with supplements, like turmeric and zinc; special soaps; tea tree oil; and disposable sweat pads for when my underarms were open wounds and draining fluid and pus. Allyson Byers, SELF, "I Have a Rare, Chronic Skin Condition, and I Went to Questionable Lengths Looking for a Cure," 1 June 2018 My chest is still day-one tanned, but my boobs, underarms, and tummy are as pale as the day I was born. Georgia Murray, refinery29.com, "I'm A Tanning Virgin — Can The King Of Tan Convert Me?," 27 June 2018 The ad campaign launched this week with a new video and stunning images by photographer Ashley Armitage showing women proudly displaying the hair in their underarms, on their legs, below their navels, and between their eyebrows. Avery Matera, Teen Vogue, "Billie’s New Razor Campaign Shows Off Body Hair," 29 June 2018 Directed and shot by photographer Ashley Armitage, Project Body Hair showcases beautiful images of women with hair, well, everywhere: underarms, legs, happy trails, toes, the mons pubis. Samantha Sasso, refinery29.com, "This $9 Razor Brand Is Changing The Way We Talk About Body Hair," 26 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'underarm.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of underarm


1816, in the meaning defined at sense 1


circa 1909, in the meaning defined above


1923, in the meaning defined at sense 1

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Statistics for underarm

Last Updated

10 Jan 2019

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Time Traveler for underarm

The first known use of underarm was in 1816

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More Definitions for underarm



English Language Learners Definition of underarm

: placed on or along the armpit


un·​der·​arm | \ ˈən-dər-ˌärm \

Kids Definition of underarm

: armpit


un·​der·​arm | \ ˈən-dər-ˌärm \

Medical Definition of underarm

: armpit

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More from Merriam-Webster on underarm

Rhyming Dictionary: Words that rhyme with underarm

Spanish Central: Translation of underarm

Nglish: Translation of underarm for Spanish Speakers

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