signal

/ˈsɪgnəl/

n./v. 信號；訊號；示意
- There was no phone signal in the valley, so the hikers used a paper map. 山谷裡沒有手機訊號，所以健行者改用紙本地圖。

其他意思

n. 訊號, 信號, 暗號

A signal is a gesture, sound, or action which is intended to give a particular message to the person who sees or hears it.
- They fired three distress signals
v. 示意, 發出信號

If you signal to someone, you make a gesture or sound in order to send them a particular message.
- The United manager was to be seen frantically signalling to McClair
adj.

You use signal to describe a success or failure when you are emphasizing the fact that it has occurred and are indicating that the consequences are significant.
- His final round was a signal triumph in a career marked by many sweet moments.

也出現在：

sign + al記號 + 形容詞