noun
a term used in fashion to describe a specific style of neckline
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The dress featured a beautiful sweetheart neckline that accentuated the bride's shoulders.
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I love how the sweetheart neckline on this top shows off my collarbones.
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That dress with the sweetheart neckline is so cute, I need it!
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Her smile was like a sweetheart neckline, framing her face with warmth and charm.