Bloomers

a costume for women, advocated about 1850 by Amelia Jenks Bloomer, consisting of a short skirt, loose trousers gathered and buttoned at the ankle, and often a coat and a wide hat.
bloomers, (used with a plural verb)

loose trousers gathered at the knee, formerly worn by women as part of a gymnasium, riding, or other sports outfit.
women’s underpants of similar, but less bulky, design.
the trousers of a bloomer costume.
any of various women’s garments with full-cut legs gathered at the bottom edge.

(of a woman’s garment) having full-cut legs gathered at the bottom edge:
bloomer shorts.
a plant that blooms:
a night bloomer.
a person who develops skills, abilities, interests, etc., commensurate with his or her capacities:
a quiet, methodical child who became a late bloomer.
a foolish mistake; blunder.
Contemporary Examples

Ode to Joy: Dolce, Versace and Bottega in Milan for Spring 2013 Robin Givhan September 22, 2012

Historical Examples

Clothing and Health Helen Kinne
The Bill-Toppers Andre Castaigne
Wyn’s Camping Days Amy Bell Marlowe
Clothing and Health Helen Kinne
The Copperhead Harold Frederic
Clothing and Health Helen Kinne
Keineth Jane D. Abbott
Clothing and Health Helen Kinne
Beautiful Gardens in America Louise Shelton

plural noun
(informal) women’s or girls’ baggy knickers
(formerly) loose trousers gathered at the knee worn by women for cycling and athletics
(history) Also called rational dress. long loose trousers gathered at the ankle and worn under a shorter skirt
noun
a plant that flowers, esp in a specified way: a night bloomer
noun
(Brit, informal) a stupid mistake; blunder
noun
(Brit) a medium-sized loaf, baked on the sole of the oven, glazed and notched on top
n.
n.