n.

1. 办理，处置，执行[the S]
   He attends to the transaction of important business himself.

   他亲自料理重要的生意。

2. 交易；业务；买卖[C]
   A record is kept of all the firm's transactions.

   公司的一切交易都有记载。

3. （学会等的）议事录，会报，会刊[P]
4. 【律】和解协议[C]

n.

1. an instance of buying or selling.
   ▸the action of conducting business.
2. an exchange or interaction between people.
3. (transactions) published reports of proceedings at the meetings of a learned society.
4. an input message to a computer system dealt with as a single unit of work.