Definition of Signal

a gesture or sign used to communicate

Examples of Signal in a sentence

The biker used his left hand as a signal that he would be making a turn.  

Giving a signal to the driver, the police officer waved the cars on at the crash site.  

The spies had a new signal that was used to let each other know that the coast was clear.  

Giving a signal with his hand, the coach let the players know it was time to switch up the play.  

High up in the tower, the traffic controller gave a signal to let the pilot know he was cleared for take-off.  

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