An intruder dream symbolizes feelings of vulnerability, invasion of personal space, or a need to protect oneself. It may represent hidden fears or concerns about someone or something entering your life without permission or causing disruption. The intruder could be a metaphor for an unwanted influence or a fear of being violated emotionally, physically, or psychologically. Exploring the specific actions or traits of the intruder in the dream can provide additional insights into the nature of the threat or apprehension you may be experiencing.