1. 插头
    A plug on a piece of electrical equipment is a small plastic object with two or three metal pins which fit into the holes of an electric socket and connects the equipment to the electricity supply.

2. 插座
    A plug is an electric socket.

3. （浴缸或水槽的）塞子
    A plug is a thick, circular piece of rubber or plastic that you use to block the hole in a bath or sink when it is filled with water.

    e.g. She put the plug in the sink and filled it with cold water.
           她把水槽的塞子塞上，注满凉水。

4. （木头、塑料或蜡制的堵洞）塞子，栓
    A plug is a small, round piece of wood, plastic, or wax which is used to block holes.

plug的反义词

    e.g. A plug had been inserted in the drill hole.
           钻孔已塞上了塞子。

5. 把…塞住；堵塞；填塞
    If you plug a hole, you block it with something.

    e.g. Crews are working to plug a major oil leak.
           船员正在封堵一个漏油的大洞。

6. 大肆宣传（尤指书或电影）；为…大做广告
    If someone plugs a commercial product, especially a book or a film, they praise it in order to encourage people to buy it or see it because they have an interest in it doing well.

    e.g. We did not want people on the show who are purely interested in plugging a book or film.
           我们不想让那些只想为书或电影做广告的人上节目。

7. see also: earplug;spark plug

8. 停止；中断；取消
    If someone in a position of power pulls the plug on a project or on someone's activities, they use their power to stop them continuing.

    e.g. The banks have the power to pull the plug on the project.
           银行能让该工程下马。

相关词组：plug awayplug inplug into