Quick definitions from WordNet (index)
▸ noun: the finger next to the thumb
▸ noun: an alphabetical listing of names and topics along with page numbers where they are discussed
▸ noun: a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
▸ noun: a numerical scale used to compare variables with one another or with some reference number
▸ noun: a mathematical notation indicating the number of times a quantity is multiplied by itself
▸ verb: provide with an index ("Index the book")
▸ verb: list in an index
▸ verb: adjust through indexation ("The government indexes wages and prices")
▸ Also see index
▸ noun: the finger next to the thumb
▸ noun: an alphabetical listing of names and topics along with page numbers where they are discussed
▸ noun: a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
▸ noun: a numerical scale used to compare variables with one another or with some reference number
▸ noun: a mathematical notation indicating the number of times a quantity is multiplied by itself
▸ verb: provide with an index ("Index the book")
▸ verb: list in an index
▸ verb: adjust through indexation ("The government indexes wages and prices")
▸ Also see index