1 to choose an actor for a particular part in a movie or play -- selezionare per il casting
Why is he always cast as a criminal? Perché gli viene sempre dato il ruolo di criminale?
2 to use magic to make something happen to someone -- lanciare un incantesimo su qualcuno
3 to throw -- gettare, lanciare
4 to get rid of; to take off -- perdere
Some snakes cast their skins.
5 to shape (metal etc) by pouring into a mould/mold -- colare
Metal is melted before it is cast.