What does 4 knocks in a dream mean?

In dream interpretation, four knocks can symbolize a call to attention or a significant message that needs to be acknowledged. It may represent a need for change or a warning about an impending situation in your waking life. Additionally, the number four often relates to stability and foundation, suggesting that whatever the message is, it may pertain to your personal or emotional stability. Ultimately, the specific meaning can vary based on the dreamer's personal experiences and emotions.