When you dream of being assassinated, it signifies desperate situation which must be changed drastically. There are some of the details, that needs to be resolved. If you dream of seeing someone being assassinated, it signifies your rejection to small components, which might look irrelevant, but it has lots of significance in your life. Make sure you do not avoid these details, because it will have much importance in the future.
Read more about dreaming of Assassin in other dream meanings interpretations.