/ ˈbluːməz; NAmE -ərz/ noun [ pl. ]
1.
( informal ) an old-fashioned piece of women's underwear like long loose underpants
2.
short loose trousers / pants that fit tightly at the knee, worn in the past by women for games, riding bicycles, etc. :
a pair of bloomers
••
WORD ORIGIN
mid 19th cent.: named after Mrs Amelia J. Bloomer (1818–94), an American social reformer who advocated a similar garment.