snowboardingsnow‧board‧ing /ˈsnəʊbɔːdɪŋ $ ˈsnoʊbɔːrd-/ noun [uncountable] 
the sport of going down snow-covered hills on a snowboard—snowboarder noun [countable]: 
a group of skiers and snowboarders
the sport of going down snow-covered hills on a snowboard—snowboarder noun [countable]: a group of skiers and snowboarders