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n. pl. in·dex·es or in·di·ces (-dĭ-sēz′)
1. Something that serves to guide, point out, or otherwise facilitate reference, especially:
a. An alphabetized list of names, places, and subjects treated in a printed work, giving the page or pages on which each item is mentioned.
b. A thumb index.
c. A table, file, or catalog.
d. Computers A list of keywords associated with a record or document, used especially as an aid in searching for information.
2. Something that reveals or indicates; a sign: "Her face ... was a fair index to her disposition" (Samuel Butler).
3. A character (☞) used in printing to call attention to a particular paragraph or section. Also called hand.
4. An indicator or pointer, as on a scientific instrument.
a. Mathematics A number or symbol, often written as a subscript or superscript to a mathematical expression, that indicates an operation to be performed, an ordering relation, or a use of the associated expression.
b. A number derived from a formula, used to characterize a set of data.
a. A statistical value that represents the price or value of an aggregate of goods, services, wages, or other measurable quantities in comparison with a reference number for a previous period of time.
b. A number that represents the change in price or value of stocks or other securities in a particular market, sector, or asset class.
c. The stocks or other securities represented by an index.
7. Index Roman Catholic Church A list formerly published by Church authority, restricting or forbidding the reading of certain books.
tr.v. in·dexed, in·dex·ing, in·dex·es
a. To furnish with an index: index a book.
b. To enter in an index.
2. To indicate or signal.
3. To adjust through indexation.

[Middle English, forefinger, from Latin; see deik- in Indo-European roots.]

in′dex′er n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.indexing - the act of classifying and providing an index in order to make items easier to retrieve
classification, compartmentalisation, compartmentalization, assortment, categorisation, categorization - the act of distributing things into classes or categories of the same type
References in classic literature ?
His air remained calm and cold, his small compressed mouth indexing his powers of self-control; his face wearing still that terrible sterile expression which had spread thereon since her disclosure.
Management also can use the same technique in indexing nonfinancial results to establish the cost savings.
Using the company's patented inline indexing approach, data is indexed at wire speed through connections on a storage area network (SAN) or local area network (LAN) for availability on demand when needed.
Because actual real estate holdings are bought and sold infrequently, indexing the "market value" of these holdings is slow and problematic, while pension plans and other institutions need a more reliable and regularly available benchmark.
Index Engines, the leader in next-generation enterprise-wide indexing solutions, announced today that it has formed an all-star advisory board with industry pundits with backgrounds at EMC, Network Appliance, CommVault and Copan Systems.