What is meant by national income in monetary term?

National income in monetary terms refers to the total value of all goods and services produced within a country's borders over a specific period, typically measured annually. It includes various components such as wages, profits, rents, and taxes minus subsidies. This metric serves as an indicator of a nation's economic performance and overall economic health, reflecting the income earned by residents and businesses. National income can be expressed in several ways, including Gross Domestic Product (GDP), Gross National Product (GNP), and Net National Income (NNI).