及物动词

不及物动词

名词

1. any nonverbal action or gesture that encodes a message

e.g. signals from the boat suddenly stopped

Synonym: signalingsign

2. any incitement to action

e.g. he awaited the signal to start
the victory was a signal for wild celebration

3. an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes