a board resembling a skateboard with four wheels, used for riding down mountainsides.
verb
[no object] (often as noun mountainboarding)
ride on a mountainboard:mountainboarding came about when a few frustrated skaters wanted to tackle some more adventurous terrainover 100,000 kids mountainboarded at camps last summer
Derivatives
mountainboarder
noun
mountainboard in other Oxford dictionaries
Definition of mountainboard in the US English dictionary
