The light in her cell signaled to Nicole that it was time to rise.

The loud music and boldly flashing lights signaled a meeting.

A green light signalled the beginning of a fight.

A warning light signaled the presence of a pacifier field.

The green light signalled he was clear to taxi in.

When the temperature is not right, a red light will signal a potential problem.

Today green lights universally signal that a system is turned on and working as it should.

The green light signaled a conference call was on.

A light in the instrument cluster signaled an "open" status for the Switchback.