Trade is the activity of buying, selling, or exchanging goods or services between people, firms, or countries.

When people, firms, or countries trade, they buy, sell, or exchange goods or services between themselves.

A trade is a particular area of business or industry.

Someone's trade is the kind of work that they do, especially when they have been trained to do it over a period of time.

If someone trades one thing for another or if two people trade things, they agree to exchange one thing for the other thing.

If you trade places with someone or if the two of you trade places, you move into the other person's position or situation, and they move into yours.

In professional sports, for example football or baseball, if a player is traded from one team to another, they leave one team and begin playing for another.

If two people or groups trade something such as blows, insults, or jokes, they hit each other, insult each other, or tell each other jokes.