Date: 1500-1600
Language: Latin
Origin: 'first finger, guide', from indicare; INDICATE


1 noun
in‧dex1 W3 [countable]
1 plural indexesTCN an alphabetical list of names, subjects etc at the back of a book, with the numbers of the pages where they can be found
2 plural indexesTC a set of cards or a database containing information, usually arranged in alphabetical order and used especially in a library
3 plural indices a standard by which the level of something can be judged or measured
index of
The changing size of an infant's head is considered an index of brain growth.
4 plural indices or indexes technicalBBT a system by which prices, costs etc can be compared to those of a previous date

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