1. the edge of a garment at or below the neck, especially the front opening of a woman’s dress or top

Examples

• The dress had a high neckline that covered her collarbone.
• She chose a sweater with a V-shaped neckline.
• The wedding gown featured an elegant lace neckline.
• He adjusted the neckline of his shirt before the interview.
• The designer created several dresses with different neckline styles.
• Her necklace complemented the boat neckline perfectly.