Would you please signal me when you arrive at the train station?
The teacher raised his hand as a signal that it was time for us to be quiet.
The radio waves transmitted the signal from the microphone to the transmitter.
The captain used the ship's horn to signal incoming boats to be aware of its presence.
The traffic light turned red, so I stopped my car as a signal of obedience.
The traffic signal turned green and we could finally cross the road.
The phone signal was weak in the basement, so we had to move to the balcony.
The loud noise acted as a signal for the dog to bark.
The smoke from the chimney signaled that someone was cooking something delicious.
The teacher gave us a signal to start the exam.
The captain raised the signal flag to warn the other ships of the storm approaching the coast.
The doctor told me to watch out for any warning signals, such as persistent chest pain or difficulty breathing.
The traffic lights were showing a red signal, so I had to stop my car and wait for the green light.
I lost the signal on my mobile phone just as I was about to make an important call.
The radio host gave the signal to start the music, and the band began playing their first song.
The sudden absence of radio signal left the astronauts feeling isolated and uncertain.
The captain instructed the crew to send a distress signal when they realized the ship was sinking.
The athlete's performance was praised for its flawless execution, which included following each signal from the coach.
The traffic light emitted a green signal, indicating it was safe to cross the road.
The teacher used a hand signal to quiet the class when they became too noisy during the lesson.
The sudden signal drop while she was giving her presentation left her feeling embarrassed and frustrated.
The president's announcement sent a positive signal to the economy, with immediately visible effects.
Despite the bad weather, the strong signal from the radio tower kept us connected with the outside world.
The bright and flashing signal from the ambulance alerted everyone to move out of the way.
The absence of any distress signal from the missing aircraft has led investigators to believe that the plane's disappearance was deliberate.
The body language of the job candidate was a strong signal that they were lying during the interview.
The signal strength was so weak that I couldn't even load a webpage.
The sudden drop in the stock market was a signal of a possible recession.
The conductor gave a clear signal for the train to depart from the station.
The government issued a warning signal to evacuate the area before the hurricane hit.