1. 电报(指通信系统)
    Telegraph is a system of sending messages over long distances, either by means of electricity or by radio signals. Telegraph was used more often before the invention of telephones.

2. 给…发电报;用电报发送(信息)
    To telegraph someone means to send them a message by telegraph.

    e.g. Churchill telegraphed an urgent message to Wavell...
           丘吉尔给韦维尔发了封紧急电报。
    e.g. 'Please,' he telegraphed, 'just leave it alone.'...
           “拜托，”他在电报中说，“别管它了。”

3. 流露，透露(计划或意图)
    If someone telegraphs something that they are planning or intending to do, they make it obvious, either deliberately or accidentally, that they are going to do it.

    e.g. The commission telegraphed its decision earlier this month by telling an official to prepare the order.
           本月早些时候，委员会命令一位官员准备起草指令，透露了其决定。