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

 

slacklining

 noun
noun
BrE BrE//ˈslæklaɪnɪŋ//
 
; NAmE NAmE//ˈslæklaɪnɪŋ//
 
[uncountable]
 
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the activity or sport of balancing on a rope or a strong strip of cloth that is fixed above the ground but not stretched tightly