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primary industry UK US noun ECONOMICS, PRODUCTION
► [C] an important or the most important industry in a country or area: »
The state's primary industry is tourism.
► [C or U] an industry that produces energy or basic materials, such as coal, oil, metals, crops, etc., or these industries considered as a group: »
Developing countries often have a higher proportion of their workforce involved in primary industries than developed countries.
Financial and business terms. 2012.