From Longman Dictionary of Contemporary Englishindexin‧dex1 /ˈɪndeks/ ●●○ W2 AWL noun [countable] 1 (plural indexes)TCNLIST an alphabetical list of names, subjects etc at the back of a book, with the numbers of the pages where they can be found2 (plural indexes)TC a set of cards or a database containing information, usually arranged in alphabetical order and used especially in a library3 (plural indices /ˈɪndəsiːz/)SIGN/INDICATION a standard by which the level of something can be judged or measuredindex of The changing size of an infant’s head is considered an index of brain growth.4 (plural indices /ˈɪndəsiːz/ or indexes) technicalBBT a system by which prices, costs etc can be compared to those of a previous date
Examples from the Corpus
index• The changing size of an infant's head is considered an index of brain growth.• The Nasdaq composite index slumped 20. 33 points, or 1. 2 percent, at 1,650. 92.• The Philadelphia Fed said its general economic index fell to negative 16. 6 for January from 11. 3 in December.• The Dow Jones index surged 47.63 points in late trading to close at 3353.76 having risen by 124 points in four sessions.• The forward market index fell 73.25 to 6,589.07.• Look under B in the index to see if biology is covered in the book.• It's a lot quicker if you use the index.• An example of this index page is shown in figure 6.2.• Telecom and smelting shares pulled down the broader Topix index of all shares on the first section of the Tokyo Stock Exchange.• The Topix index lost 1. 79, or 0. 11 percent, to 1,585. 52.• That is rarer still for a worldwide index.indexindex2 AWL verb [transitive] 1 TCNLISTif documents, information etc are indexed, an index is made for them The reports are indexed by subject and location.2 BEWto arrange for the level of wages, pensions etc to increase or decrease according to the level of pricesbe indexed to something British English demands that wages be indexed to the rise in pricesbe indexed for something American English an amount indexed for inflationGrammar Index is usually passive. —indexation /ˌɪndekˈseɪʃən/ noun [countable, uncountable]→ See Verb tableExamples from the Corpus
index• In the bottom-up approach the paragraphs are first collected, and the semantic net is built as the paragraphs are indexed.• It is presented in an A4 ring binder and each section is well indexed.• The reports are indexed by subject and location as appropriate on a card index.• The Republican budget would increase the exclusion to $ 750,000 and index it for inflation.• Alternatives, such as increasing the penalty for early retirement and adjusting benefit indexing, should also be discussed.• The ranking would index the impact of various diseases and other health indicators.From Longman Business Dictionaryindexin‧dex1 /ˈɪndeks/ noun (plural indexes or indices /-dɪsiːz/)1[countable] something such as a price, amount, level etc that shows the general level of related prices etcThe price of gold bullion on the exchange remains a sensitive index of confidence in the international market.2[countable]ECONOMICS a figure showing the level of something, for example prices, in relation to earlier levels. Indexes often use the figure 100 as the BASE in a particular year and figures for later years are given in relation to this base3[countable]FINANCE (also share index), stock index an official list of the average price of shares in a group of companies on a particular stockmarketMilan’s Stock Index fell 2% in the year.the Nikkei share index → benchmark index → FTSE 30 Share Index → FTSE 100 Share Index → FTSE All-Share Index → FTSE Eurotop 100 Index → FTSE Eurotop 300 Index → FTSE Fledgling Index → FTSE Mid 250 Index → FTSE Small Cap Index → Hang Seng Index → IPO 100 Index → Nikkei index → Russell 2000 Index → Standard & Poor’s Index → sustainability index → Thirty-Share Index → weighted index → see also CAC 40, DAX, Dow Jones averagesindexindex2 verb [transitive]1ECONOMICSFINANCE to arrange for the level of payments such as wages or PENSIONs to go up at the same rate as something else, usually pricesindex something to somethingTax exemptions should be indexed to the purchasing power of the pound.2if an investment is indexed to something, for example a currency or a STOCK INDEX, its value rises and falls in relation to the currency etcThe yield of Ukrainian treasury bills is indexed to the value of the local currency, the hryvnia, in terms of the dollar. —indexation noun [uncountable]The government has so far resisted claims for a return to wage-price indexation despite a wave of strikes.→ See Verb tableOrigin index1 (1500-1600) Latin “first finger, guide”, from indicare; → INDICATE 