a board with wheels that is ridden in a standing or crouching position

ride on a flat board with rollers attached to the bottom

a narrow platform with attached wheels, developed in the twentieth century from a scooter, for recreation and transportation

a precision instrument The board's tips are the most important part of the board

a small board on wheels that is used for rolling

a small piece of wood in the shape of a surfboard with four wheels attached to it

A skateboard is a narrow wheeled platform used for the activity of skateboarding. Though the exact date of invention of skateboards is unknown, it was in the 1940s and 1950s that children participated in soap box derbys where they would race soap-boxes attached to wooden planks on rollerskate wheels. During events like this, some of the soap-boxes became detached from the planks, leaving the rider with what was a skateboard.