index in WordNet English dictionary

1. a mathematical notation indicating the number of times a quantity is multiplied by itself
   exponent  power  index 
   
2. the finger next to the thumb
   index  index finger  forefinger 
   
3. an alphabetical listing of names and topics along with page numbers where they are discussed
   index 
   
4. 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
   index  index number  indicant  indicator 
   
5. a numerical scale used to compare variables with one another or with some reference number
   index 
   

1. adjust through indexation
   "The government indexes wages and prices"
   index 
   
2. provide with an index
   "index the book"
   index 
   
3. list in an index
   index