What does it mean if you are killed on a dream?

The action of being killed is used as a metaphor in the dream. Without further information, a full interpretation is not possible, but in general, the dream suggests that the dreamer feels that he/she is being destroyed in some way. For example, the dreamer might feel that their career has been "killed" by being passed over for a promotion, or that their life is over because of being grounded by parents.