skymark

2. A visible feature in the sky, such as a cloud shape or star pattern, used to remember a direction.

Sailors once read the skymark of the evening star to steer their ships.

3. A brand or logo painted on the side of an aircraft.

The airline's blue skymark was easy to spot on the tail of the plane.

4. A high point or summit that stands out against the sky.

The mountain's snowy skymark could be seen from the next valley.

5. A temporary streak or trail left in the sky, like a contrail.

A thin skymark traced the jet's path across the sunset.