[n] the finger next to the thumb
[n] an alphabetical listing of names and topics along with page numbers where they are discussed
[n] 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
[n] a mathematical notation indicating the number of times a quantity is multiplied by itself
[n] a numerical scale used to compare variables with one another or with some reference number
[v] adjust through indexation; "The government indexes wages and prices"
[v] provide with an index, as of a book
[v] list in an index