1. a mutual fund whose assets are stocks on a given list;
2. a mutual fund that invests in the stocks that are the basis of a well-known stock or bond index;
WordNet (r) 3.0 (2006):
index fund
n 1: a mutual fund whose assets are stocks on a given list
2: a mutual fund that invests in the stocks that are the basis
of a well-known stock or bond index