A skateboard is a four wheeled piece of wood used for the activity of skateboarding. The modern skateboard originated in California in the late 1950's. By the mid 1960's they were mass produced and sold throughout the United States.
A skateboard is propelled by pushing with one foot while the other remains on the board, or by pumping in structures such as a pool or halfpipe. A skateboard can also be used by simply standing on the deck while on a downward slope and allowing gravity to propel the board and rider.
There is no governing body which declares any regulations on what constitutes a skateboard or the parts from which it is assembled. Loangboards are a type of skateboard with a longer wheelbase and larger and softer wheels.