English

Definition of contrail noun from the Oxford Advanced Learner's Dictionary

 

contrail

 noun
noun
BrE BrE//ˈkɒntreɪl//
 
; NAmE NAmE//ˈkɑːntreɪl//
 
(North American English)
 
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the white line that is left in the sky by a plane Contrails criss-crossing clear skies can form beautiful patterns. see also vapour trail
See the Oxford Advanced American Dictionary entry: contrail