armpit

noun

arm·​pit ˈärm-ˌpit 

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

Examples of armpit in a Sentence

a city described as the armpit of America

Recent Examples on the Web

About six months later, however, a bunch of new bumps popped up on the skin between my breasts, as well as on my armpits, groin, and thighs. —Julia Ries, SELF, 12 Dec. 2024

Separate your knees and guide them toward your armpits. —Cory Martin, Verywell Health, 20 Nov. 2024

The girl was taken to a hospital and survived — the bullet had entered below her chin, went through her chest and exited near her armpit. —John Diedrich, Journal Sentinel, 5 Dec. 2024

The tool is practically painless and helps you to remove unwanted hair for good from your bikini line, armpits, legs, back, and even your face. —Hannah Rice, Rolling Stone, 22 Nov. 2024

Word History

First Known Use

14th century, in the meaning defined at sense 1

Kids Definition

armpit

noun

arm·​pit ˈärm-ˌpit 

: the hollow beneath the spot where the arm and shoulder join

Medical Definition

armpit

noun

arm·​pit ˈärm-ˌpit 

: the hollow beneath the junction of the arm and shoulder : axilla