[mass noun]communication over a distance by cable, telegraph, telephone, or broadcasting 电信,远距离通信,长途通信 ■(telecommunications)[treated as sing.]the branch of technology concerned with such communication 电信学 ■[count noun](formal)a message sent by such means (正式)电信信息
语源
1930s: from French télécommunication, from télé- 'at a distance' + communication 'communication'