signal
名词 signal:
any communication that encodes a message
any incitement to action
an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
动词 signal:
communicate silently and non-verbally by signals or signs
同义词:sign, signalize, signalise
be a signal for or a symptom of
同义词:bespeak, betoken, indicate, point
形容词 signal:
notably out of the ordinary