To trade

Is to purchase and sell goods and services, either at the individual, commercial or nation-to-nation levels [Market Business News].
Trade is the voluntary exchange of goods or services between different economic actors. Since the parties are under no obligation to trade, a transaction will only occur if both parties consider it beneficial to their interests.
Trade can have more specific meanings in different contexts. Trade refers to purchasing and selling securities, commodities, or derivatives in financial markets.
In macroeconomics, the trade usually refers to international trade, the system of exports and imports that connects the global economy. A product sold to the global market is an export, and a product bought from the global market is an import. Exports can account for a significant source of wealth for well-connected economies.
Generally, there are two types of trade—domestic and international. Domestic trades occur between parties in the same countries. International trade occurs between two or more countries. A country that places goods and services on the international market is exporting those goods and services. One that purchases goods and services from the international market is importing those goods and services [Investopedia].

Sources:

What is trade? Definition and meaning. Market Business News. Retrieved from: https://marketbusinessnews.com/financial-glossary/trade-definition-meaning/

Trade Definition in Finance: Benefits and How It Works. Investopedia. Retrieved from: https://www.investopedia.com/terms/t/trade.asp