📒 a list of names or topics that are referred to in a book, etc., usually arranged at the end of a book in alphabetical order or listed in a separate file or book
📒 a box of cards with information on them, arranged in alphabetical order
📒 a system that shows the level of prices and wages, etc. so that they can be compared with those of a previous date
📒 a number giving a measurement of something compared with a particular standard
📒 a sign or measure that something else can be judged by
📒 a list of the records in a computer file with information about where each is located
📒 the small number written above a larger number to show how many times that number must be multiplied by itself. In the equation 42 = 16, the number 2 is an index.