Word forms: plural vapour trailsregional note: in AM, use vapor trail
countable noun
A vapour trail is a white line of water vapour left in the sky by an aeroplane, a rocket, or a missile.
vapour trail in British English
noun
a visible trail left by an aircraft flying at high altitude or through supercold air, caused by the deposition of water vapour in the engine exhaust as minute ice crystals
Also called: condensation trail, contrail
Examples of 'vapour trail' in a sentence
vapour trail
And perhaps the tempo of the game has been set, with the vapour trails of Friday still hanging over the stadium.