underarm

1 of 3

adjective

un·​der·​arm ˈən-dər-ˈärm 

1

British : underhand sense 3

2

: placed under or on the underside of the arm

underarm seams

underarm

2 of 3

adverb

un·​der·​arm ˌən-dər-ˈärm 

British : underhand sense 2

underarm

3 of 3

noun

un·​der·​arm ˈən-dər-ˌärm 

1

: armpit sense 1

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

Drop-shoulder or dolman sleeves provide more room in the underarm area, reducing friction without adding bulk. —Lauryn Higgins, Flow Space, 6 May 2026

Similarly, this polka-dot pick looks breezy and loose in all the right places, including the underarm area. —Alyssa Grabinski, PEOPLE, 13 Apr. 2026

Noun

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

Word History

First Known Use

Adjective

1816, in the meaning defined at sense 1

Adverb

circa 1909, in the meaning defined above

Noun

1923, in the meaning defined at sense 1

Rhymes for underarm

• firearm
• alarm
• disarm
• forearm
• gendarme
• nonfarm
• rearm
• arm
• charm
• farm
• harm

Kids 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