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noun / verb

index

IN-deks/ˈɪndeks/

An organized list that helps locate information.

The book's index lists topics with page numbers.

An open book's index page with ONLY three essential entries rendered legibly: Apple 12, Bridge 24, Cloud 36.
Etymology

The Latin noun named anything that points something out, including a pointing finger. A book's index performs that same function by directing readers from a topic to its location in the text.

In context

Phillip Taylor1:42
total number 244 the index at the back has page numbering which is quite useful then of course what you do have a substantial index there's the beginning of the index there
Phillip Taylor MBE review: Global Capital Markets. A Survey of Legal and Regulatory Trends

More examples

  • She indexed the files.
  • Several indexes needed updating.
  • They are indexing the collection.

Forms

index · indexs · indexed · indexing · indexes

Similar words

catalog
Lists items rather than necessarily pointing to their location in a text.
directory
Usually lists people, organizations, or locations.