index

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index¹

  • /ˈɪndɛks/ Canada, US, UK
  • /ˈɪndɛks/ California
  • [ˈɪndæks] California
  • /ˈɪndeks/ Australia

Where it comes from

From Latin index (“a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription”), from indicō (“point out, show”); see indicate.

noun indexes · indices · index's

  1. An alphabetical listing of items and their location. The index of a book lists words or expressions and the pages of the book upon which they are to be found.
  2. The index finger; the forefinger.

    Similar: arrow-finger, demonstrator, first finger, forefinger, index, index finger, lickpot, pointer, pointer finger, pointling, showing finger, teacher

  3. A movable finger on a gauge, scale, etc.

    Similar: pointer

  4. A symbol resembling a pointing hand, used to direct particular attention to a note or paragraph.

    Similar: manicule, see others in Wikipedia at manicule § Terminology

  5. That which points out; that which shows, indicates, manifests, or discloses. Among the gravity indexes is the severance of diplomatic relations.

    Similar: indicator

  6. A sign; an indication; a token. His son's empty guffaws […] struck him with pain as the indices of a weak mind.
  7. A type of noun where the meaning of the form changes with respect to the context; e.g., 'Today's newspaper' is an indexical form since its referent will differ depending on the context. See also icon and symbol.
  8. A single number calculated from an array of prices or of quantities.
  9. A number representing a property or ratio; a coefficient. In other words, we predict that the index for a new pair of materials can be obtained from the indexes of the individual materials, both against air or against vacuum.
  10. A raised suffix indicating a power.
  11. especially An integer or other key indicating the location of data, e.g. within an array, vector, database table, associative array, or hash table.
  12. A data structure that improves the performance of operations on a table.
  13. The number of cosets that exist. The index of 2ℤ in ℤ is 2.
  14. obsolete A prologue indicating what follows. Ay me, what act, that roars so loud and thunders in the index?

verb indexes · indexing · indexed

  1. transitive To arrange an index for something, especially a long text. MySQL does not index short words and common words.
  2. To inventory; to take stock.
  3. To normalise in order to account for inflation; to correct for inflation by linking to a price index in order to maintain real levels.
  4. To measure by an associated value. For thousands of years, human progress was indexed to the ease and speed of our mobility: our capacity to walk on two legs, and then to ride on animals, sail on boats, chug across the land and fly through the air, all to procure for ourselves the food and materials we wanted.
  5. transitive To be indexical for (some situation or state of affairs); to indicate. For example, the feature I indexes the current speaker in the speech event and you, the current addressee.
  6. To access a value in a data container by an index.
  7. transitive To use a mechanism to move an object to a precise location.

Index²

proper noun

  1. An unincorporated community in Miller County, Arkansas.
  2. An unincorporated community in Morgan County, Kentucky.
  3. A ghost town in Cass County, Missouri.
  4. A small hamlet in Otsego County, New York.
  5. An unincorporated community in King George County, Virginia.
  6. A town in Snohomish County, Washington.
  7. An unincorporated community in Gilmer County, West Virginia.

Thesaurus

Closest in meaning: indicator, indicant, exponent, power, index finger, forefinger, index number, chapter, file, subscript, catalogue, catalog, addendum, number, sign, compendium

Translations

Every language

noun alphabetical listing of items

Españolíndice
한국어색인 saegin
日本語索引 sakuin, インデックス indekkusu, 表題 hyōdai, 総目録 sōmokuroku
中文索引 suǒyǐn, 引得 yǐndé
हिन्दीअनुक्रम anukram
Portuguêsíndice
Françaisindex
DeutschIndex, Verzeichnis
Italianoindice
Ελληνικάκατάλογος katálogos, ευρετήριο evretírio, πίνακας pínakas
Românăindex
Русскийуказа́тель ukazátelʹ, и́ндекс índɛks
Tiếng Việtchỉ số, chỉ mục
العربيةدَلِيل dalīl, فِهْرِس fihris
עבריתמפתח mafteakh

noun index finger

Españolíndice

noun movable finger on a gauge, scale, etc.

Españolíndice, índex

noun sign, indication, token

Ελληνικάένδειξη éndeixi
Русскийпоказа́тель pokazátelʹ, знак znak

noun economics: single number calculated from an array of prices or quantities

中文指數 /指数 zhǐshù
Françaisindice
Italianoindice
Ελληνικάδείκτης deíktis
Русскийи́ндекс índɛks

noun science: number representing a property or ratio

Ελληνικάσυντελεστής syntelestís
Русскийкоэффицие́нт koefficijént

noun mathematics: raised suffix indicating a power

Portuguêsexpoente
Ελληνικάεκθέτης ekthétis
Русскийпоказа́тель сте́пени pokazátelʹ stépeni

noun programming: key indicating location of data

Русскийи́ндекс índɛks
العربيةفِهْرِس fihris

noun data structure

DeutschIndex
Русскийи́ндекс índɛks

verb to arrange an index

Españolindizar, indexar
Portuguêsindexar
Françaisindexer
Deutschindizieren
Italianoindicizzare
Ελληνικάκαταλογογραφώ katalogografó
Русскийиндекси́ровать indeksírovatʹ

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Cite this
MLA

"index." Wiktionary, via Micwyn, micwyn.com/word/index. Accessed 6 Nov. 2026.

APA

index. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/index

Chicago

"index." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/index.

BibTeX
@misc{index_2026,
  title = {index},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/index},
  urldate = {2026-11-06}
}