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English definition of “index”

index

noun (COMPARISON)    /ˈɪn.deks/ (plural indices or indexes)
[C] a system of numbers used for comparing values of things that change according to each other or a fixed standard : the FTSE 100 Index the Dow Jones Index a wage / price indexNumerical relationships [C usually singular] something that shows how strong or common a condition or feeling is: Consumer spending is often a good index of public confidence in the economy .Statistics
(Definition of index noun (COMPARISON) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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