Definitions from Wiktionary ( )

▸ noun:  An alphabetical listing of items and their location.
▸ noun:  The index finger; the forefinger.
▸ noun:  A movable finger on a gauge, scale, etc.
▸ noun:  (typography) A symbol resembling a pointing hand, used to direct particular attention to a note or paragraph.
▸ noun:  That which points out; that which shows, indicates, manifests, or discloses.
▸ noun:  A sign; an indication; a token.
▸ noun:  (linguistics) 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.
▸ noun:  (economics) A single number calculated from an array of prices or of quantities.
▸ noun:  (sciences) A number representing a property or ratio; a coefficient.
▸ noun:  (mathematics) A raised suffix indicating a power.
▸ noun:  (computing, especially programming and databases) An integer or other key indicating the location of data, e.g. within an array, vector, database table, associative array, or hash table.
▸ noun:  (computing, databases) A data structure that improves the performance of operations on a table.
▸ noun:  (algebra, index of a subgroup) The number of cosets that exist.
▸ noun:  (obsolete) A prologue indicating what follows.
▸ verb:  (transitive) To arrange an index for something, especially a long text.
▸ verb:  To inventory; to take stock.
▸ verb:  (chiefly economics) To normalise in order to account for inflation; to correct for inflation by linking to a price index in order to maintain real levels.
▸ verb:  To measure by an associated value.
▸ verb:  (linguistics, transitive) To be indexical for (some situation or state of affairs); to indicate.
▸ verb:  (computing) To access a value in a data container by an index.
▸ noun:  An unincorporated community in Miller County, Arkansas.
▸ noun:  An unincorporated community in Morgan County, Kentucky.
▸ noun:  A ghost town in Cass County, Missouri.
▸ noun:  A small hamlet in Otsego County, New York.
▸ noun:  An unincorporated community in King George County, Virginia.
▸ noun:  A town in Snohomish County, Washington.
▸ noun:  An unincorporated community in Gilmer County, West Virginia.
▸ Also see index

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