neckline
n. countable B1 Intermediate UK //nˈɛklaɪn// neck·line
n. the part of a piece of clothing that sits at the top of your neck. It can be round, square, or have a V-shape.
n. the upper edge of a garment that fits around the neck. Often used to describe the specific shape or style of the opening.
She chose a dress with a high neckline for the cold weather.
The designer is famous for creating dresses with a deep V-neckline that flatters many different body types.
While the fabric was lightweight and breathable, the high neckline provided the necessary protection from the sun during the long hike across the desert.