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to signal
01
to give someone a message, instruction, etc. by making a sound or movement
02
to indicate something as a sign for something else
03
to do something to make one's feelings or opinions known
Signal
01
信号
a gesture or action used to convey a message without using words
02
信号
any incitement to action
03
信号
a series of electrical or radio waves carrying data to a radio, television station, or mobile phone
signal
01
notably out of the ordinary
例
The referee signaled a penalty by raising the yellow card.
The coach signaled the players to execute a specific play using hand gestures.
In a crowded room, she discreetly signaled her friend across the table to join her.
The traffic officer signaled drivers to stop or proceed using hand signals.
Every morning, the familiar sound of the train bell signaled the start of the commuter rush hour.
