Can’t find any information on the yellow-eyed junco in your guide to rare birds? Check out your bird book's index. It’s an alphabetical list in the back of the book that catalogs all of the subjects covered by page number.

In financial terms, an index is a list of stocks that are traded on the stock market, such as the Dow Jones Indexes. “Index cards” were once used to catalog books in a library, but now they’re mostly used to prepare for a test or a presentation, thanks to computers. As a verb, index describes the action of creating an index, such as, “I’m going to index my photo collection on my computer, so I can find what I’m looking for.”

Primary Meanings of index

an alphabetical listing of names and topics along with page numbers where they are discussed
list in an index
a numerical scale used to compare variables with one another or with some reference number
the finger next to the thumb
Full Definitions of index

n an alphabetical listing of names and topics along with page numbers where they are discussed

an index of all main words in a book along with their immediate contexts
Type of:
list, listing
a database containing an ordered array of items (names or topics)

v list in an index

make an index that refers from one point to the next
Type of:
include in a list

v provide with an index

index the book”
Type of:
furnish, provide, render, supply
give something useful or necessary to

v adjust through indexation

“The government indexes wages and prices”
Type of:
determine, influence, mold, regulate, shape
shape or influence; give direction to

n a numerical scale used to compare variables with one another or with some reference number

margin of error, margin of safety, safety margin
the margin required in order to insure safety
Type of:
graduated table, ordered series, scale, scale of measurement
an ordered reference standard

n a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time

index number, indicant, indicator
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BMI, body mass index
a measure of someone's weight in relation to height; to calculate one's BMI, multiply one's weight in pounds and divide that by the square of one's height in inches; overweight is a BMI greater than 25; obese is a BMI greater than 30
business index
a statistical compilation that provides a context for economic or financial conditions
leading indicator
one of 11 indicators for different sections of the economy; used by the Department of Commerce to predict economic trends in the near future
price index, price level
an index that traces the relative changes in the price of an individual good (or a market basket of goods) over time
short account
the aggregate of short sales on an open market
stock index, stock market index
index based on a statistical compilation of the share prices of a number of representative stocks
retail price index
an index of changes in retail prices
producer price index, wholesale price index
an index of changes in wholesale prices
CPI, consumer price index, cost-of-living index
an index of the cost of all goods and services to a typical consumer
Type of:
a statement or assertion of verified information about something that is the case or has happened

n a mathematical notation indicating the number of times a quantity is multiplied by itself

exponent, power
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the highest power of a term or variable
log, logarithm
the exponent required to produce a given number
degree of a term
the sum of the exponents of the variables in the term
degree of a polynomial
the degree of the term in the polynomial that has the highest degree
first degree
a degree of one
common logarithm
a logarithm to the base 10
Napierian logarithm, natural logarithm
a logarithm to the base e
Type of:
mathematical notation
a notation used by mathematicians

n the finger next to the thumb

forefinger, index finger
Type of:
any of the terminal members of the hand (sometimes excepting the thumb)

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