warning signal

For 18 months the aircraft was redesigned and retro-fitted with a VRS warning signal.

It looked as though he was concerned about something—perhaps my record or the Palm Pilot had triggered a warning signal.

They have been an early warning signal by uncovering bad news.

Eagerly a young trooper, carbine in hand, sprang up and stood by the sergeant's side as the latter repeated his warning signal.

As soon as the warning signal was given, it exhibited all the signs of a hurried and forced departure.

On this Friday night the midshipmen ran to their rooms as usual at the warning signal.

If the warning signal was made immediately, the storming parties would have their maximum time cut down by only ten minutes.

He mounted to the high glen to see the Fiana raise their warning signal of heroic chase and hunting.