Definition of mountainboard noun from the Oxford Advanced American Dictionary

 

mountainboard

 noun
noun
NAmE//ˈmaʊntnˌbɔrd//
 
(also all-terrain board)
 
jump to other results
a short narrow board with wheels like a skateboard that can be used for going down mountains
mountainboardingnoun[uncountable]
 
jump to other results
See the Oxford Advanced Learner's Dictionary entry: mountainboard