1. kneeboard - Noun
2. kneeboard - Verb
(surfing) A short (often less than 6'), broad (sometimes extremely broad) surfboard designed to be ridden in the surf in a kneeling position, and often having traction pads in the central area as an alternative to wax, to help the knees grip the deck.
(aviation) A clipboard carried in the lap of an airplane pilot, on which basic flight data is recorded.
(waterskiing) A short wakeboard designed to be ridden in the kneeling position.
kneeboard (third-person singular simple present kneeboards, present participle kneeboarding, simple past and past participle kneeboarded)
to surf or water-ski using a kneeboard