/ˈkɔːsɪt/ noun
noun: corset; plural noun: corsets
• a woman’s tightly fitting under-garment extending from below the chest to the hips, worn to shape the figure.
• a tightly fitting undergarment worn by men or women to support a weak or injured back.
HISTORICAL
• a tightly fitting laced or stiffened outer bodice.
Origin
Latin “corpus”- Old French “cors”- Middle English ”corset”.
Middle English: from Old French, diminutive of cors ‘body’, from Latin corpus . The sense ‘close-fitting undergarment’ dates from the late 18th century, by which time the sense ‘bodice’ had mainly historical reference.
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Definitions from Oxford Languages Dictionary.