The line formed by the edge of an article of clothing that surrounds the neck, especially as seen at the front.

plural of neckline

Having a specified kind of neckline.

A neckline that arcs up over the breasts, with a depression in the middle.

plural of sweetheart neckline

A (very) low-cut neckline, found on some dresses and other garments.

plural of plunging neckline

(fashion) A boat neckline

(fashion) A heart-shaped style of neckline that accentuates décolletage

(fashion) A nautically-inspired wide neckline that runs horizontally, front and back across the collarbone