The term "wealthy nation" refers to a country that has a high level of economic prosperity and wealth. This can be measured by factors such as GDP per capita, income equality, standard of living, access to resources, and overall quality of life. Wealthy nations typically have strong economies, advanced infrastructure, and well-developed social systems, including healthcare, education, and social welfare programs. These countries often enjoy a high level of international influence and are able to participate in global affairs as major players.