Horcrux

A Horcrux is an object in which a witch or wizard has hidden a fragment of their soul, split by murder, so that they cannot die while it survives. Voldemort makes several, aiming at seven fragments. The known Horcruxes are the diary, the ring, the locket, the cup, the diadem, Nagini, and the unintended fragment in Harry. All of them are destroyed by the end of the Battle of Hogwarts.