Decollete

decollete [ dey-kol-TEY ]
[ adjective ]

MEANING :
1. a low neckline (of a dress)
2. wearing a strapless dress or one with a low neckline

EXAMPLE 1 :
The decollete dress that she wore for the parade must have cost the sponsors a tidy sum.

EXAMPLE 2 :
The cowl neck that is the designer's trademark tantalizingly exposed the actress's decollete.