1 a system of roads, railway lines, nerves, etc that are connected to each other （道路、铁路、神经等）网络: an underground railway network 地下铁路网

2 a group of people or companies that work closely together 紧密合作的一组人或公司；联络网: We have a network of agents who sell our goods all over the country. 我们有一个代理商网络，把货品销售到全国各地。

3 a number of computers that are connected together so that information can be shared 计算机网络

4 a group of television or radio companies that are connected and that send out the same programmes at the same time in different parts of a country 电视网，广播网（一组电视或广播公司在全国不同地区同时播放相同的节目）