English definition of “trade”
BUYING AND SELLING [U] › the buying and selling of large numbers of goods or services, especially between countries: a trade agreement/dispute They rely heavily on trade with Europe. The laws ban the international trade in ivory.
BUSINESS [C] › a particular area of business or industry: the building/tourist trade
JOB [C] › someone's job, especially one which needs skill in using their hands: He's a builder by trade.