On no visible signal, Harp and Stevn began taking off their clothes.

The Inuit believed the aurora borealis to be visible signals from the dead.

Having the first visible signal, the researchers began optimizing the process.

Construction activity in the Charlotte area offers a more visible signal of the erosion taking place.

They made a signal clearly visible by day.

Without any visible signal, the other seven warriors shucked their shirts too, at the same moment.

The sliding yen had been a visible and humiliating signal of Japanese economic weakness.

Baby monitors may have a visible signal as well as repeating the sound.

No audible or visible signal had been given.

Would they flash visible signals through Aradia's land even if no one there could interpret them?