Definition of index in English:

index

Line breaks: index
Pronunciation: /ˈɪndɛks
 
/

noun (plural indexes or especially in technical use indices /ˈɪndɪsiːz/)

1(In a book or set of books) an alphabetical list of names, subjects, etc. with reference to the pages on which they are mentioned: clear cross references supplemented by a thorough index
More example sentences
  • Endnotes, bibliography, and an index of names and subjects facilitate scholarly use and quick reference.
  • It contains 648 pages of text, spread over 39 chapters and an epilogue, as well as a subject and a name index, each of which takes up 26 pages.
  • Helpful appendices, extensive references, and subject and name indices conclude the volume.
1.1An alphabetical list by title, author, or other category of a collection of books or documents, for example in a library.
More example sentences
  • Examples of finding aids include collection indexes, inventories, registers and guides.
  • Some libraries have created indexes to these works.
  • All library items are listed through a main author, title, and subject index.
Synonyms
register, list, listing, inventory, directory, guide, key, catalogue, table of contents
1.2 Computing A set of items each of which specifies one of the records of a file and contains information about its address.
More example sentences
  • The method includes a tag counting system for indexing structured documents and for implementing the structure indexes within the relational database.
  • Each search engine has their own set of rules, algorithms, regulations, etc., that they apply to web sites that become part of their indices or databases.
  • This is because you need to wait for search engines to update their index with the current information.
2A sign or measure of something: exam results may serve as an index of the teacher’s effectiveness
More example sentences
  • Another approach is to evaluate patients when their symptoms and signs raise the index of suspicion of depression.
  • The state of the love life in this sign is the index of overall happiness.
  • The arm circumference of each child was measured as an index of nutritional status.
Synonyms
guide, clue, hint, indication, indicator, lead, sign, signal, mark, token, evidence, symptom, implication, intimation, suggestion
2.1A figure in a system or scale representing the average value of specified prices, shares, or other items as compared with some reference figure: the hundred-shares index closed down 9.3
More example sentences
  • Despite the fact there are house price and share indices aplenty, comparing the long-term performance of these two assets is not easy.
  • For economic and monetary policy formulation, the price index represents a central indicator.
  • Price indexes necessarily average out the extremes; they are unable to signal the more subtle price movements and they leave out relevant items such as asset prices.
2.2 [with modifier] A number giving the magnitude of a physical property or other measured phenomenon in terms of a standard: the oral hygiene index was calculated as the sum of the debris and calculus indices
More example sentences
  • Current care provision is inadequate, at least according to dementia care index standards, and urgent action is required.
  • Although mental development index scores decreased over time for both groups of infants, children prenatally exposed to cocaine had scores that decreased faster.
  • ‘Diversity index scores are just a starting place for looking at diversity,’ Parker emphasizes.
3 Mathematics An exponent or other superscript or subscript number appended to a quantity.
More example sentences
  • The thesis contains a proof of the fact that for any closed manifold the sum of the indices of a generic vector field is a topological invariant, namely the Euler characteristic.
  • If we look at the indices of the Fibonacci numbers, we can directly predict which Fibonacci number will be the square of the hypotenuse.
  • Step 3: Find the cobasic variable in the equation chosen in step 2 that has the smallest index and a positive coefficient.
4A pointer on an instrument, showing a quantity, a position on a scale, etc.
4.1 Printing A symbol shaped like a pointing hand, used to draw attention to a note.

verb

[with object] Back to top  
1Record (names, subjects, etc.) in an index: the list indexes theses under regional headings
More example sentences
  • Alternate names are indexed within the alphabetical listing with references to the proper heading.
  • Taxonomic names are completely indexed, so that genus and species are given for each subspecific name.
  • Neither subject was indexed nor readily apparent in the table of contents.
1.1Provide an index to: she offered help in indexing my text book on bookselling data sets are indexed by subject
More example sentences
  • I fail to see what the harm is in indexing a book and helping people find it.
  • ‘We're trying to index every book there is, and make it searchable for our users,’ the spokesman added.
  • Because I so copiously mark and index a book, I usually have no need of a bookmark - I simply flip through to find where the marking and indexing stop!
2Link the value of (prices, wages, or other payments) automatically to the value of a price index: the Supreme Soviet passed legislation indexing wages to prices
More example sentences
  • The British replacement rate is now lower than 20 per cent and steadily declining because UK basic pensions are indexed to prices rather than to average earnings.
  • So instead of the Government being fair and deciding that it would index income tax rates as well as all those user charges, it has tried to pretend that it does not need to.
  • It's also the third, following Washington and Oregon, to index its minimum wage to inflation.
3 [no object] (often as noun indexing) (Of a machine or part of one) move from one predetermined position to another in order to carry out a sequence of operations: [as modifier]: a lathe with a cross-slide and an indexing arrangement
More example sentences
  • Newly developed software allows the gage to check parts during indexing without affecting machine layout or cycle time.
  • When a pass is complete, the barrel is rotated or indexed to the position of the next groove.
  • Disciplined training can achieve a state in which the subconscious mind takes care of gun indexing and trigger control and the conscious mind is just along for the ride.

Origin

late Middle English: from Latin index, indic- 'forefinger, informer, sign', from in- 'towards' + a second element related to dicere 'say' or dicare 'make known'; compare with indicate. The original sense 'index finger' (with which one points), came to mean 'pointer' (late 16th century), and figuratively something that serves to point to a fact or conclusion; hence a list of topics in a book (‘pointing’ to their location).

Derivatives

indexable

Pronunciation: /ˈɪndɛksəbl, ɪnˈdɛksəbl/
adjective
More example sentences
  • I could copy the cache automatically to an indexable disk every evening.
  • He said, ‘Search engines can scan approximately three million servers and 800 million indexable Web pages.’
  • Many other strange things happen to these files when converted to an indexable format.

indexation

Pronunciation: /ɪndɛkˈseɪʃ(ə)n/
noun
More example sentences
  • Long-term capital gains arising from transfer of equity shares are taxed at 20 per cent if indexation benefit is availed of and at 10 per cent without benefit of indexation.
  • And while the Prime Minister says this is record funding, an increase of 25 per cent, according to the Opposition it's mainly just indexation.
  • This will facilitate full indexation of tax bands, possible tax cuts and increased spending in politically sensitive areas.

indexer

noun
More example sentences
  • He and his wife Susan, a proof-reader and indexer, have no children.
  • We also decided to allow our indexers to override the system.
  • They are very complex and require that indexers and classifiers have extensive training.

indexible

adjective
More example sentences
  • Shear blades are indexible for economical cutting.
  • These advancements in indexible knife technology and knife-ring design maximize fiber utilization, flake quality, and operating efficiencies.
  • This study covers the world outlook for precision ground carbide indexible and throwaway inserts for machine tools and metalworking machinery across more than 200 countries.

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