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signal noun

  /ˈsɪɡnəl/
  • A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
 合図, 信号, シグナル
  • (of a radio, TV, telephone, internet, etc.) An electromagnetic action, normally a voltage that is a function of time, that conveys the information of the radio or TV program or of communication with another party.
 電波
  • An on-off light, semaphore, or other device used to give an indication to another person.
 合図, 信号
time signal
時報
traffic signal
交通信号
distress signal
救助信号
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