cor ‧ set /ˈkɔːsət, ˈkɔːsɪt $ ˈkɔːr-/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Origin: corset 'tightly fitting piece of outer clothing' (13-19 centuries) , from Old French , from cors ; CORSE ]
a piece of tight-fitting underwear that women wore especially in the past to make them look thinner