Being taken over by something foreign is read as feeling controlled by emotion, habit or another person. Tradition sees it as a struggle for your own will, not a literal threat. Watching your body act against your wishes is linked to feeling that stress or anger is steering you. Seeing someone else possessed points to a person who seems not themselves. Resisting and regaining control is read as reclaiming autonomy. Dream books across many cultures read it in this symbolic way. It can help to notice what influence in your days feels stronger than your own voice.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.