1. plural of index; alphabetical lists of names, subjects, etc. with references to the places where they occur
2. signs or measures that indicate the state or level of something
3. numbers used to indicate the power to which a mathematical expression is to be raised
Usage: mathematics

Examples

• The book has detailed indices for both subjects and authors.
• Stock market indices showed significant gains this quarter.
• Economic indices suggest the country is recovering from recession.
• The professor explained how to work with indices in algebraic equations.
• These indices help researchers locate specific topics quickly.
• The cost of living indices vary greatly between cities.
• Students must learn to calculate expressions with fractional indices.