trade

Concise Oxford English Dictionary © 2008 Oxford University Press:
trade/treɪd/

▶noun

• 1 the buying and selling of goods and services.

  ■ N. Amer. (in sport) a transfer.

• 2 a job requiring manual skills and special training.

• 3 (the trade) [treated as sing. or pl.] a particular area of business.

  ■ dated, chiefly derogatory the practice of making one's living in business, as opposed to in a profession or from unearned income.

• 4 a trade wind.

▶verb

• 1 buy and sell goods and services.

  ■ buy or sell (an item or product).

  ■ (especially of shares or currency) be bought and sold at a specified price.

  ■ N. Amer. transfer (a player) to another team.

• 2 exchange, typically as a commercial transaction.

  ■ give and receive (insults or blows).

  ■ (trade something in) exchange a used article in part payment for another.

  ■ (trade something off) exchange something of value, especially as part of a compromise.

• 3 (trade on) take advantage of.

– derivatives
tradable (or tradeable) adjective,
trading noun.

– origin ME: from Mid. Low Ger., lit. ‘track’, of W. Gmc origin; rel. to tread.