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

The right median nerve extends down the entire length of the arm, starting at the armpit and ending in the hand. — Barry Jackson, Miami Herald, 15 Sep. 2026

Yet all anyone could talk about, afterward, was the sight of Cole’s unshaven armpits at the ceremony. — Rachel Syme, New Yorker, 14 Sep. 2026

In September 1871, he was summoned to Queen Victoria, who had a rapidly growing abscess in her left armpit. — Abe Baker-Butler, STAT, 9 Sep. 2026

Either way, the scenarios are enough to make armpits cave — and sweat — under pressure. — Jackie Fields, PEOPLE, 1 Sep. 2026

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for armpit

• acquit
• admit
• backlit
• befit
• cockpit
• commit
• dalit
• dendrite
• emit
• illite
• misfit
• moonlit

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