noun
bikini; two-piece swimsuit
Refers to the swimwear, especially a two-piece swimsuit. Usually written in katakana.
新しいビキニを買った。
I bought a new bikini.
彼女は海で赤いビキニを着ていた。
She was wearing a red bikini at the beach.
noun
Bikini Island
Place-name use referring to Bikini Island; in ordinary writing it often appears as ビキニ島 when the geographical sense needs to be clear.
地図でビキニ島の位置を確認した。
I checked the location of Bikini Island on the map.