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

 

slipstream

 noun
noun
BrE BrE//ˈslɪpstriːm//
 
; NAmE NAmE//ˈslɪpstriːm//
 
[singular]
 
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the stream of air behind a vehicle that is moving very fast He was riding in the slipstream of the cyclist in front.
See the Oxford Advanced American Dictionary entry: slipstream