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IELTS BNC: 1793 COCA: 2621

index

1 of 2

noun

in·​dex ˈin-ˌdeks How to pronounce index (audio)
plural indexes or indices ˈin-də-ˌsēz How to pronounce index (audio)
1
: a list (as of bibliographical information or citations to a body of literature) arranged usually in alphabetical order of some specified datum (such as author, subject, or keyword): such as
a
: a list of items (such as topics or names) treated in a printed work that gives for each item the page number where it may be found
b
: a list of publicly traded companies and their stock prices
c
: a bibliographical analysis of groups of publications that is usually published periodically
d
: thumb index
2
a
: a number (such as a ratio) derived from a series of observations and used as an indicator or measure
specifically : index number
b
: the ratio of one dimension of a thing (such as an anatomical structure) to another dimension
3
a
: a device (such as the pointer on a scale or the gnomon of a sundial) that serves to indicate a value or quantity
b
: something (such as a physical feature or a mode of expression) that leads one to a particular fact or conclusion : indication
4
plural usually indices : a number or symbol or expression (such as an exponent) associated with another to indicate a mathematical operation to be performed or to indicate use or position in an arrangement
3 is the index of the expression {latex}\sqrt[3]{5}{/latex} to indicate the cube root of 5
5
: a character ☞ used to direct attention to a note or paragraph

called also fist

6
: a list of restricted or prohibited material
specifically, capitalized : a formerly published list of books the reading of which was prohibited or restricted for Roman Catholics by the church authorities

index

2 of 2

verb

indexed; indexing; indexes

transitive verb

1
a
: to provide with an index
b
: to list in an index
all persons and places mentioned are carefully indexed
2
: to serve as an index of
3
: to regulate (wages, prices, interest rates, etc.) by indexation

intransitive verb

: to index something
indexer noun

Synonyms

Noun

Verb

Example Sentences

Noun Look up the recipe for potato soup in the index. Potato soup is listed under “soup” in the index. The card catalog is an index to the materials in the library. the index on a scale Verb This search engine has indexed hundreds of millions of websites. indexed all the books in the library by category See More
Recent Examples on the Web
Noun
But the Standard & Poor’s 500 index ended the day down 1.1 percent, hurt by news that Russia would delay reopening an important gas pipeline to Europe. Larry Edelman, BostonGlobe.com, 2 Sep. 2022 Prices in the San Diego metro, which includes all of San Diego County, rose eighth-most in the 20-city index. Phillip Molnar, San Diego Union-Tribune, 30 Aug. 2022 Such a system would boost opportunities for candidates endorsed by smaller parties, and Ms. Mitsui says the countries ranking as most equal in the Global Gender Gap index have each adopted some kind of proportional representation system. Takehiko Kambayashi, The Christian Science Monitor, 23 Aug. 2022 All 30 Dow stocks were lower, and only 25 of the stocks in the blue chip S&P 500 index traded higher Monday. Julia Horowitz, CNN, 23 Aug. 2022 Some 95% of stocks in the benchmark index lost ground. CBS News, 22 Aug. 2022 Investors and traders tend to be forward-looking, and recession fears helped trigger a roughly 20% slide in the Standard & Poor’s 500 index during the first half of 2022, as investors anticipated that activity was cooling. Russ Wiles, The Arizona Republic, 31 July 2022 Stock markets rose significantly, with the Dow Jones industrial average gaining 1.4% and the broader Standard & Poor’s 500 index closing 2.6% higher. Don Lee, Los Angeles Times, 27 July 2022 The Standard & Poor's 500 index officially fell into bear market territory Monday after falling more than 20% this year from its all-time high set in January. Susan Tompor, Detroit Free Press, 15 June 2022
Verb
As the documents piled up, Posey installed floor-to-ceiling shelves in a warehouse attached to Newport Aeronautical’s office, paying people to help file and index the growing collection. WIRED, 19 Aug. 2022 This way, Google bots can categorically index such web pages. Ran Ronen, Forbes, 30 June 2022 Most states with graduated income tax rates index their income tax brackets for inflation. Patrick Gleason, Forbes, 16 June 2022 Currently, 13 states do not index their income tax brackets to inflation, mostly in the South and Mid-Atlantic regions. Adam A. Millsap, Forbes, 13 Apr. 2022 The 1940 census records were released a decade ago, but the federal government didn't transcribe and index the names. Bill Bowden, Arkansas Online, 10 Apr. 2022 Congress should ultimately index unemployment benefits nationwide, but in the short run, states must take the lead. Jonathan Ingram, WSJ, 5 Jan. 2022 The original plan was a nonstarter for too many members, but a small group of senators is working on a proposal to index the price of a select number of drugs. Lauren Fox And Phil Mattingly, CNN, 26 Oct. 2021 Republicans insisted on no change to corporate tax rates; the Biden Administration and congressional Democrats adamantly opposed proposals to index the gas tax or enact fees on electric vehicles. Susan B. Glasser, The New Yorker, 24 June 2021 See More

Word History

Etymology

Noun

Latin indic-, index, from indicare to indicate

First Known Use

Noun

1561, in the meaning defined at sense 3a

Verb

1720, in the meaning defined at transitive sense 1a

Time Traveler
The first known use of index was in 1561

Phrases Containing index

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