Meaning & use
index
An alphabetical list of names, subjects, or terms at the end of a book, showing where each is discussed.
See it in a sentence
I checked the index to find every page that mentioned the French Revolution.
The textbook's index made it easy to locate the chapter on cell division.
A note on using this word
In finance, "index" also names a measure that tracks changes in a group of related values, such as a stock market index.
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. verb
To create a systematic list or record of items so they can be found and referenced easily.
The librarian spent weeks indexing the archive's newly donated letters.
3. noun
A number that measures changes in the price or value of a group of related items over time.
The stock index fell sharply after the announcement of higher interest rates.
Make it your own
Write a sentence using “index”, then compare your use with the examples above.