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

 

portage

 noun
noun
BrE BrE//ˈpɔːtɪdʒ//
 
; NAmE NAmE//ˈpɔːrtɪdʒ//
 
[uncountable]
 
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the act of carrying boats or goods between two rivers Word Origin late Middle English: from French, from porter ‘carry’. The current sense dates from the late 17th cent.
See the Oxford Advanced American Dictionary entry: portage