un·​der·​arm | \ ˈən-dər-ˈärm How to pronounce underarm (audio) \

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 How to pronounce underarm (audio) \

Definition of underarm (Entry 2 of 3)


un·​der·​arm | \ ˈən-dər-ˌärm How to pronounce underarm (audio) \

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

Adverb He threw the ball underarm.
Recent Examples on the Web: Adjective Julia Roberts, who greeted the crowd at the Notting Hill premiere—and sent shock waves through the industry—with unapologetic thickets of underarm growth in 1999. Lauren Valenti, Vogue, "17 Women Who Prove That Underarm Hair Is the Ultimate Show of Confidence," 31 July 2020 For instance, pubic and underarm hair, as well as the hair on your head, is known as terminal hair, which is noticeably stronger and thicker than the rest of the hair on the body. Sarah Kinonen, Allure, "The Science of Beauty: The Complete Guide to Body Hair," 23 Dec. 2020 Despite the fatigue, Medvedev still had the presence of mind to successfully execute an underarm serve whilst 4-3 ahead in the second set. Ben Church, CNN, "Daniil Medvedev hits underarm serve on his way to victory against Alexander Zverev," 16 Nov. 2020 But the highlight—quite literally—was the subtle lick of light blue eyeshadow Leon matched with her dress, serving as the perfect complement to an otherwise all-natural look that featured a fresh-faced glow and underarm hair. Liam Hess, Vogue, "Lourdes Leon Has the Secret to Laid-Back Vacation Beauty," 18 Aug. 2020 Dear Heloise: My deodorant can leave stains in the underarm area of my shirts. Washington Post, "Hints From Heloise: An old-fashioned wish for the birthday kid," 10 Sep. 2020 To home in on what gives these peculiar primates their baneful bite, Fry and his colleagues collected the underarm secretions from a handful of wild slow lorises housed at a research station in Indonesia and isolated the proteins within. Katherine J. Wu, Smithsonian Magazine, "What Does a Study of Slow Lorises Actually Say About Cat Allergies?," 19 Feb. 2020 Here, a look back at all the renegades begging you to hold the razor and go au naturale with your underarm hair. Lauren Valenti, Vogue, "17 Women Who Prove That Underarm Hair Is the Ultimate Show of Confidence," 31 July 2020 Any ideas on how to remove underarm shirt stains caused by deodorant? Heloise, Washington Post, "Hints From Heloise: Deodorant stains won’t come out," 19 June 2020 Recent Examples on the Web: Noun Eyebrows, on the other hand, provide an entirely different purpose than that of underarm or pubic hair. Sarah Kinonen, Allure, "The Science of Beauty: The Complete Guide to Body Hair," 23 Dec. 2020 This thermometer takes body temperature in a number of locations including via mouth and underarm. Popular Science, "Thermometers to get you through your cold," 1 Dec. 2020 There’s also mesh sewn into the underarm and side panels of both shirts to help vent body heat. Natalie Krebs, Outdoor Life, "The Ultimate Hunting Gift Guide for Women," 18 Nov. 2020 But that’s not to say the underarm serve is a tool of the unskilled player. Joshua Robinson, WSJ, "The Easiest, Riskiest, Most Controversial Shot in Tennis," 30 Sep. 2020 If your coach also insisted that the male volleyball or basketball players must shave their underarms and legs, then perhaps this wouldn’t qualify as discrimination. Amy Dickinson, Washington Post, "Ask Amy: Teens deal with forced shaving, snubs and old-fashioned tech," 10 Mar. 2020 In the September issue of Harper's Bazaar, actress Emily Ratajkowski posed with unshaven underarms (a full 360-degree turn for the publication since its early anti-armpit hair messages). Marianna Cerini, CNN, "Why women feel pressured to shave," 3 Mar. 2020 There are places where perspiration is accepted—SoulCycle, saunas—but soggy underarms at a cocktail party or stains in a board meeting? Garrett Munce, Town & Country, "MiraDry Is a Game-Changing New Treatment to Stop Perspiration," 1 Mar. 2020 Shaving an underarm is like shaving under the neck because many people reverse their blade strokes to move against the direction of the hair’s growth. Ellen Byron, WSJ, "Does Your Razor Need a Gender?," 1 Feb. 2020

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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Time Traveler for underarm

Time Traveler

The first known use of underarm was in 1816

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Last Updated

26 Jan 2021

Cite this Entry

“Underarm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underarm. Accessed 27 Feb. 2021.

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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 How to pronounce underarm (audio) \

Kids Definition of underarm

: armpit


un·​der·​arm | \ ˈən-dər-ˌärm How to pronounce underarm (audio) \

Medical Definition of underarm

: armpit

More from Merriam-Webster on underarm

Nglish: Translation of underarm for Spanish Speakers

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