Definitions
1.NounThe vertical distance between the waterline and the uppermost watertight deck of a vessel, or the vertical distance from the waterline up to the top of the gunwale (of an open boat)."By the time the whole team and all its equipment were loaded on board, there wasn't much freeboard anymore, and if the weather had been worse we might have had to postpone the trip."
2.NounThe distance between a water level and the top of something that contains or restrains it (such as a dam).
3.NounThe distance between the top of sea ice and the water level.
4.NounA type of skateboard which simulates the movement of a snowboard when used on a downhill coarse, allowing snowboarding techniques, which has an addition of two centerline casters that extend below the traditional skateboard wheels and bogies.