The term 'data lakehouse' refers to a unified data platform that combines the best features of data lakes and data warehouses. It allows organizations to store both structured and unstructured data in a single repository, enabling flexible analytics and big data processing. The lakehouse architecture provides support for advanced analytics, real-time data processing, and machine learning, making it easier for data scientists and analysts to derive insights. This unified approach breaks down data silos, improves accessibility, and lowers costs associated with managing multiple data platforms.