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Noun index has 5 senses
 index  a numerical scale used to compare variables with one another or with some reference number
_{1} is a kind of scale, scale of measurement, graduated table, ordered series
_{1} has particulars: margin of safety, safety margin, margin of error
 index, index number, indicant, indicator  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
_{2} is a kind of fact
_{2} has particulars:
 exponent, power, index  a mathematical notation indicating the number of times a quantity is multiplied by itself
_{3} is a kind of mathematical notation
_{3} has particulars: degree; logarithm, log
 index  an alphabetical listing of names and topics along with page numbers where they are discussed
_{4} is a kind of list, listing
_{4} is a part of back matter, end matter
_{4} has part: key word
_{4} has particulars: concordance
 index, index finger, forefinger  the finger next to the thumb
_{5} is a kind of finger
