- 1an alphabetical list of names, subjects, etc. with reference to the places where they occur, typically found at the end of a book
- 2a number or ratio that represents a property or quantity's relation to another property or quantity
- 3a statistical measure of the change in an economy or a stock market
Using index: Examples
Take a moment to familiarize yourself with how "index" can be used in various situations through the following examples!
I found the term in the index at the back of the book.
The consumer price index rose by 2% last year.
The Dow Jones Industrial Average is an index of 30 major American companies.
The index finger is usually the most dexterous and sensitive of the fingers.
index Synonyms and Antonyms
Idioms Using index
The product was taken off the index due to safety concerns.
The library put the new book on the index of recommended reads.
to wear a ring on the index finger, typically the finger next to the thumb
She proudly wore her wedding ring on her index finger.
Phrases with index
I wrote down her phone number on an index card.
the level of concern a physician has for a particular disease or condition based on the patient's symptoms and medical history
The doctor had a high index of suspicion for cancer given the patient's family history.
a measure of the changes in the cost of basic necessities such as food, housing, and clothing over time
The cost-of-living index in this city is higher than the national average.
Origins of index
from Latin 'indicare', meaning 'to point out'
Summary: index in Brief
The term 'index' [ˈɪndeks] refers to a list of names or subjects with references to their locations, a numerical or statistical measure of a property's relation to another, or a statistical measure of economic or stock market changes. Examples include 'I found the term in the index at the back of the book,' and 'The consumer price index rose by 2% last year.' Phrases like 'index card' and idioms like 'to put something on the index' extend its usage.