developed nation

The term developed country, or advanced country, is used to categorize countries with developed economies in which the tertiary and quaternary sectors of industry dominate. This level of economic development usually translates into a high income per capita and a high Human Development Index (HDI). Countries with high gross domestic product (GDP) per capita often fit the above description of a developed economy. However, anomalies exist when determining "developed" status by the factor GDP per capita alone.
See more at Wikipedia.org...