index number - 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 timefact - a statement or assertion of verified information about something that is the case or has happened; "he supported his argument with an impressive array of facts" business index - a statistical compilation that provides a context for economic or financial conditions; "this business index is computed relative to the base year of 1995" leading indicator - one of 11 indicators for different sections of the economy; used by the Department of Commerce to predict economic trends in the near future price index, price level - an index that traces the relative changes in the price of an individual good (or a market basket of goods) over time |