Definition of: cache (1) To store data locally in order to speed up subsequent retrievals. Pronounced "cash." (2) Reserved areas of memory in every computer that are used to speed up instruction execution, data retrieval and data updating.
For example, Web browsers such as Internet Explorer, Firefox, Safari and Chrome use a browser cache to improve performance for frequently accessed web pages. When you visit a webpage, the files your browser requests are stored on your computing storage in the browser's cache.