bikini

noun

bi·​ki·​ni bə-ˈkē-nē 

plural bikinis

1

a

: a two-piece bathing suit worn by women that does not cover the midriff see also string bikini, tankini

b

: a short snug swimsuit worn by men

2

: a pair of low-cut briefs (see brief entry 2 sense 4)

Launched in May, the underwear brand for men and women includes bikinis, … G-strings and boxer briefs.

—Phyllis Furman

… ultra low-rise jeans with a built-in bikini or thong.

—Sunday Tribune (South Africa)

—often used before another noun

Bikini briefs are usually lower than the true waist, often at the hips.

—Clifford Pugh

bikinied adjective

or less commonly bikini'd

bə-ˈkē-nēd 

Examples of bikini in a Sentence

Recent Examples on the Web

Miley Cyrus shocked viewers by stripping down to a nude bikini top and briefs and grinding, twerking and thrusting on fellow performer Robin Thicke at the 2013 show in one of the raciest performances in MTV history. —Kate Hogan, PEOPLE, 7 Sep. 2025

Fellow Bravo alum Stassi Schroeder also walked in the show, along with other influencers and professional models, in a bikini only slightly more demure than Bethenny’s. —Brian Moylan, Vulture, 5 Sep. 2025

In the bikini picture, Corcoran was drying her hair after a dip in the ocean. —Janelle Ash, FOXNews.com, 4 Sep. 2025

Lakshmi shared a photo and video of herself at the beach wearing a dark pink bikini while playing in the water. —Angel Saunders, People.com, 3 Sep. 2025

Word History

Etymology

French, from Bikini, atoll of the Marshall Islands

First Known Use

1947, in the meaning defined at sense 1a

Phrases Containing bikini

• bikini wax
• string bikini

Rhymes for bikini

• acini
• aldine
• arsine
• carinii
• cosine
• delphine
• domine
• latine
• leucine
• ovine
• pennine
• porcine

Kids Definition

bikini

noun

bi·​ki·​ni bə-ˈkē-nē 

: a scanty two-piece bathing suit for a girl or woman

Etymology

from French bikini "two-piece bathing suit," from Bikini, atoll in the Marshall Islands

Geographical Definition

Bikini

geographical name

Bi·​ki·​ni bi-ˈkē-nē 

island (atoll) of the Marshall Islands

Note: Bikini was the site of U.S. atomic bomb tests in 1946 and hydrogen bomb tests in 1954 and 1956.

Bikinian

bi-ˈkē-nē-ən 

noun