décolletage

noun

dé·​col·​le·​tage (ˌ)dā-ˌkä-lə-ˈtäzh 

(ˌ)dā-ˌkȯl-ˈtäzh,

ˌde-klə-

1

: the low-cut neckline of a dress

2

: a dress having a low-cut neckline

3

: the area of a woman's chest around the top of the breasts

She highlighted her décolletage with a mesmerising necklace …

—Lily Jobson

Word History

Etymology

French, action of cutting or wearing a low neckline, from décolleter — see décolleté entry 1

First Known Use

1894, in the meaning defined at sense 1