From Longman Dictionary of Contemporary Englishcontrailcon‧trail /ˈkɒntreɪl $ ˈkɑːn-/ noun [countable] TTAa line of white steam made in the sky by a plane
Examples from the Corpus
contrail• One figure-eight contrail created as part of a NASAfunded study was tracked by satellite for 10 hours last spring.• The complacent citizen looks up and sees a distant jet's contrails, whooshing along in impressive white streams.• Sometimes contrails evaporate quickly and disappear.• I gazed up at the withering contrail.Origin contrail (1900-2000) condensation trail 