What is a special database of cleansed data and meta data called?

A special database of cleansed data and metadata is commonly referred to as a data warehouse. Data warehouses aggregate and store large volumes of structured and unstructured data from various sources, ensuring that it is cleansed, organized, and optimized for analysis and reporting. The metadata within a data warehouse provides important context about the data, such as its origin, transformation, and relationships, facilitating easier access and understanding for users.