noun
index
a statistical measure tracking a market's overall performance
In more detail
1. (noun) a list of topics or names arranged in alphabetical order at the end of a book, with page numbers showing where each topic is discussed
2. (noun) a sign or indication of something
3. (noun) a number that shows the level or value of something compared to a standard or previous level
4. (verb) to arrange something in an index or make it easy to find using an index
Examples
- 1. I found the chapter on grammar by looking in the book's index.
- 2. The high unemployment rate is an index of economic problems.
- 3. The stock market index rose 2% this month.
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