Homonym: Index (Indicator)
An index is a tool that helps you find information quickly in a book, database, or website. It usually appears at the end of a book and lists important topics, along with the page numbers where you can find them. For example, if you're looking for information about dinosaurs, you can check the index to see which pages discuss them.
In the digital world, an index can also refer to a list of data that makes searching faster. For instance, search engines like Google use indexes to organize web pages, allowing users to find relevant information in seconds.