Definition of zip line noun from the Oxford Advanced Learner's Dictionary

 

zip line

 noun
noun
BrE BrE//ˈzɪp laɪn//
 
; NAmE NAmE//ˈzɪp laɪn//
 
zip wire
 
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a cable or rope stretched between two points at different heights that people slide down for fun Fly over the treetops on a zip line.