/ brɑː; NAmE /
1.
(also formal brassière ) noun a piece of women's underwear worn to cover and support the breasts
2.
(also ˈcar bra ) (also ˈauto bra ) a tightly fitting cover that is put over the front end of a car to protect it, sometimes made of a material that absorbs the waves from police radar equipment, so that it is more difficult to tell if a driver is going too fast
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WORD ORIGIN
1930s: abbreviation of brassière .