Definify.com
Webster 1913 Edition
Locket
Lock′et
,Noun.
 1. 
A small lock; a catch or spring to fasten a necklace or other ornament. 
2. 
A little case for holding a miniature picture or lock of hair, usually suspended from a necklace or watch chain. 
Webster 1828 Edition
Locket
LOCK'ET
,Noun.