locket
US /ˈlɑː.kɪt/
UK /ˈlɑː.kɪt/
1.
a small, ornamental case, typically made of gold or silver, worn around a person's neck on a chain and used for holding a miniature portrait or a lock of hair.
:
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She wore a silver locket with a picture of her grandmother inside.
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He gave her a heart-shaped locket for her birthday.