index
nounUK /ˈɪndeks/
US /ˈɪndeks/
A list at the back of a book that shows where to find things.
Look in the index to find the page about volcanoes.
RELATED WORDS
OTHER MEANINGS
2. A number that shows how prices or values change over time.
The cost of living index went up last month.
3. The finger next to your thumb, used for pointing.
She pointed her index finger at the map.
4. To make a list of things in order so they are easy to find.
The librarian indexed all the new books.