a piece of jewellery in the form of a small case that you wear on a chain around your neck and in which you can put a picture, piece of hair, etc. 盒式项链坠(可放照片、头发等) Topics Clothes and Fashionc2Word Originlate Middle English (originally referring to a metal plate or band on a sword cover): from Old French locquet, diminutive of loc ‘latch, lock’, of Germanic origin; related to the verb lock. The current sense dates from the late 17th cent.