index
//ˈɪndɛks//
Noun
An alphabetical list of names, subjects, or topics with page numbers, typically found at the end of a book
Check the index at the back of the book to find the page number.
A number or ratio that measures a particular characteristic or indicates a change in value, such as a price index or economic indicator
The consumer price index rose by 2.5% last year.
A pointer or indicator, especially the forefinger
She pointed with her index at the map on the wall.
A sign or measure of something; an indication
The unemployment rate is an important index of economic health.
Verb
To provide a book or document with an index
She spent weeks indexing the reference book.
To record or list something in an index
All the technical terms are indexed at the back of the book.
To adjust wages, prices, or other values automatically according to changes in a price index
The government decided to index pensions to inflation.