A collection of information or data that is organized and accessible for use, often used in reference to a database or system that stores information for easy retrieval.
The company's knowledge base contains all the technical manuals and troubleshooting guides for their products.
The body of information and understanding that an individual or group possesses, often used in the context of expertise or proficiency in a particular area.
Her extensive knowledge base in molecular biology made her an invaluable asset to the research team.