An automatic signal (usually a sound) warning of danger.
Visual or audible signal indicating potential or acute danger.
1These brilliant colours serve as a visual warning signal to would-be predators.
2The warning signal that it was approaching the open road crossing at Collyweston.
3A beeping warning signal sounded inside his cockpit as he armed his missiles.
4The engineer saw the warning signal and slowed down, but did not stop.
5It was too late to give her aunt a warning signal.
6Officials said the driver ignored a warning signal and crossed onto the rail tracks.
7In a moment the warning signal for lift-off was given.
8Volumes during the rally had been weak, which was a warning signal, he said.
9I must give the first warning signal to Crawford; and he fired off a musket.
10It was so clearly an early warning signal for the impacts that Clade was exploring.
11No warning signal was raised on the bluffs; not a hand was stirred to rescue.
12The whistle is still a bit faint, but it is sending a clear warning signal.
13This warning signal has a fairly accurate track record.
14It said the pilots were unaware of the malfunction because a cockpit warning signal failed.
15Tarzan did not repeat his warning signal, but instead rushed bodily upon the waiting Terkoz.
16Suddenly, without any warning signal, apparently, all the air traffic went wild-thenit was gone.
Translations for warning signal