a short narrow board with small wheels at each end, which you stand on and ride as a sport
a skateboard park/rampskateboard verb [intransitive] skateboarder
ˈskeɪtbɔːdə(r) 
ˈskeɪtbɔːrdər ˈskeɪtbɔːdɪŋ ˈskeɪtbɔːrdɪŋ 
Definition of skateboard noun from the Oxford Advanced Learner's Dictionary
ˈskeɪtbɔːdə(r) ˈskeɪtbɔːrdər ˈskeɪtbɔːdɪŋ ˈskeɪtbɔːrdɪŋ 