n.

1. 贸易，交易，商业[U]
   Japan does lots of trade with the United States.

   日本与美国间的贸易频繁。

2. 行业[the S]
3. 手艺；职业[C][U]
   He is a blacksmith by trade.

   他是个铁匠。

4. 营业额，交易量[S][（+in）]
5. 同业者，同行[the S][G]
6. 交换[U][C]
   He got these eggs as a trade.

   他交换到这些鸡蛋。

7. 顾客，主顾[U]
   That department store has a lot of trade.

   那家百货公司顾客很多。

8. 【气】贸易风，信风[the P]

vt.

1. 交换[（+for）]
   She traded three apples for a bunch of bananas.

   她用三只苹果换得一串香蕉。

   Can I trade my tobacco for your matches?

   我用烟草换你的火柴行吗？

vi.

1. 做买卖，进行交易[（+in/with）]
   He trades in silk.

   他经营丝绸贸易。

2. 【美】做主顾[（+at/with）]
   I used to trade at that store.

   过去我常在那家商店买东西。

n.

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.

v.

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.