vapourtrail
nounUK /ˈveɪpətreɪl/
US /ˈveɪpərˌtreɪl/
A long white line of cloud that a flying airplane leaves behind in the sky.
We watched the vapourtrail stretch across the blue sky after the plane flew over.
OTHER MEANINGS
2. A visible trail of condensed water vapor left by a rocket or missile.
The rocket's vapourtrail glowed orange in the sunset.
3. A mark or trace left behind by something moving quickly.
The speedboat left a vapourtrail of spray across the lake.
4. A lingering sign or aftereffect of something that has passed.
The scandal left a vapourtrail of distrust in the company.