Messages, left by leaving a trail of smoke from an airplane, that are visible from the ground.

plural of skywriter

One who does skywriting. A pilot who writes messages, by leaving a trail of smoke from the plane, that are visible from the ground.

Third-person singular simple present indicative form of skywrite

To write a message in the sky using the trail of smoke from a moving airplane. / (education) To spell a word by tracing it in the air with one's finger.