Dreams of an execution symbolize rejection and punishment. Perhaps you are venting out your disdain for a person or an aspect of yourself of which you are ashamed. This dream might reflect your rejection of your intellect and logic (cutting off your head) in favor of your emotions and feelings. Keep in mind that a house divided against itself cannot stand. Integration of all aspects of yourself is the goal to -realization. Dreams of an executioner represents the aspect of you that is the most critically judgmental. There is an aspect of your life or a person in your life that you find want to reject and push away.
See Critic, Cut and Integration Dreams.... execution / executioner dream meaning