Décolletage /dɪˈkɒlətɑːʒ/ (or décolleté, its adjectival form, in current French) is the upper part of a woman’s torso, comprising her neck, shoulders, back and upper chest, that is exposed by the neckline of her clothing. However, the term is most commonly applied to a neckline that reveals or emphasizes cleavage. Low-cut necklines are a feature of ball gowns, evening gowns, leotards, lingerie and swimsuits, among other fashions. Although décolletage does not itself prescribe the extent of exposure of a woman’s upper chest, the design of a décolleté garment takes into account current fashions, aesthetics, social norms and the occasion when a garment will be worn.
Though neckline styles have varied in Western societies and décolletage may be regarded as aesthetic and an expression of femininity, in some parts of the world any décolletage is considered provocative and shocking.
Décolletage is a French word which is derived from décolleter, meaning to reveal the neck. The term was first used in English literature sometime before 1831. In strict usage, décolletage is the neckline extending about two handbreadths from the base of the neck down, front and back