Plural form of index, which is an alphabetical list of names, subjects, etc., with references to the places where they occur, typically found at the end of a book.
The book's indices helped me quickly find the information I needed.
A statistical measure of change in a representative group of individual data points, often used in finance to track the performance of a group of assets.
The stock market indices showed a significant increase by the end of the trading day.
A mathematical notation used to denote the position of an element in a sequence or array.
In the array, the indices start from zero, not one.