/ ˌdeɪkɒlˈtɑːʒ; NAmE -kɑːləˈt-/ (also dé·col·leté / deɪˈkɒlteɪ; NAmE ˌdeɪkɑːlˈteɪ/) noun
(from French ) the top edge of a woman's dress, etc. that is designed to be very low in order to show her shoulders and the top part of her breasts
► dé·col·leté adjective
••
WORD ORIGIN
late 19th cent.: French , from décolleter expose the neck, from dé- (expressing removal) + collet collar of a dress.