neckline

This term describes the specific geometry where a garment meets the skin of the neck, serving as a primary focal point in fashion design. It carries a neutral, descriptive connotation, though it is frequently paired with adjectives like deep, high, or plunging to signal the level of modesty or formality of an outfit.

As a standard countable noun, it follows regular English pluralization rules. It is used primarily in the context of tailoring, apparel shopping, and aesthetic descriptions of clothing.