bi ‧ ki ‧ ni /bəˈkiːni, bɪˈkiːni/ BrE AmE noun [countable]
[ Date: 1900-2000 ; Language: French ; Origin: Bikini Atoll, after a nuclear bomb test was held there in 1946 ]
a set of clothes worn by women for swimming, which consists of a top part covering the breasts, and a bottom part