Open English Wordnet
Nouns
(n)indexa numerical scale used to compare variables with one another or with some reference number (n)index, index number, indicant, indicatora 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)exponent, power, indexa mathematical notation indicating the number of times a quantity is multiplied by itself (n)indexan alphabetical listing of names and topics along with page numbers where they are discussed Verbs
(v)indexprovide with an index“index the book” (v)indexadjust through indexation“The government indexes wages and prices”