ˈhalf pipe BrE AmE , half‧pipe /ˈhɑːfpaɪp $ ˈhæf-/ noun [countable]
1 . a ↑ concrete structure which has a rounded bottom and sides and is used for ↑ skateboard ing
2 . a structure which has a rounded bottom and sides, is made from snow, and is used for ↑ snowboarding