Signaled

The ship's horn signaled its departure from the harbor.

The dip in sales signaled a need for a new marketing strategy.

The lighthouse signaled to ships to warn them of nearby rocks.

The DNA test signaled that the suspect was guilty of the crime.

The traffic light signaled that it was safe to cross the street.

The warning sign signaled a steep drop ahead on the road.

The smoke from the chimney signaled a fire in the house.

The beeping sound signaled the end of the microwave timer.

The smell of baking cookies signaled the start of the holiday season.

The teacher's nod signaled that it was time to start the test.