Definitions
1.nounA large surfboard, around 9 or 10 feet long with a wide nose."In the past three weeks on Victoria's Surfcoast I've ridden my longboard probably 90% of the time as well. — Coastalwatch.com.au http//www.coastalwatch.com.au/news/news.aspx?newsId=55&newsType=admin&adType=news"
2.nounA large skateboard, measuring about 90 to 150 centimeters.
3.verbTo travel by longboard.
4.nounA rigid carrying surface for an injured person, designed to prevent the movement of the spine during transportation in order to prevent further damage to it.