Satis House is a fictional estate in Charles Dickens' novel 'Great Expectations,' symbolizing the themes of wealth, decay, and the complexities of human relationships. The house serves as a critical backdrop for character development, particularly for Pip and Estella, showcasing how environment influences identity and ambition. As a place filled with remnants of grandeur, Satis House reflects the contrasting realities of appearance versus reality, highlighting the emotional detachment of its inhabitants.