1. noun /ˈɪndɛks/
a) An alphabetical listing of items and their location; for example, the index of a book lists words or expressions and the pages of the book upon which they are to be found.
His sons empty guffaws ... struck him with pain as the indices of a weak mind.
Syn: arrow-finger, demonstrator, forefinger, index finger, insignitor, lickpot, pointling, showing finger, teacher
2. verb /ˈɪndɛks/
a) To arrange an index for something, especially a long text.
Wikipedia foundation.