A new definition has been added to the Forecasting Dictionary (http://www.forecastingprinciples.com/index.php?option=com_content task=view id=19 Itemid=18). The definition is of the index method; a somewhat neglected forecasting method that dates at least from Benjamin Franklin's time and that ri… vals regression analysis or econometrics in usefulness and accuracy. In developing the index method definition, we have been reminded of the untapped potential of the Dictionary for describing terms that are important to the forecasting discipline. We therefore invite suggestions of new terms and for improvements in the definitions of terms that are already defined in the Dictionary. Please send your suggestions to Kesten (mailto:email@example.com?subject=Forecasting%20Dictionary).