dé·col·le·tage
noun/ˌdeɪkɒlˈtɑːʒ/
/ˌdeɪkɑːləˈtɑːʒ/
(also décolleté
(from French)/deɪˈkɒlteɪ/
/ˌdeɪkɑːlˈteɪ/
)- the top edge of a dress, etc. that is designed to be very low in order to show the shoulders and the top part of the breasts
连衣裙等的上边缘设计得很低，以露出肩膀和胸部的顶部