freeboard

Meaning

Noun

• The vertical distance between the waterline and the uppermost watertight deck of a vessel.
• The distance between a water level and the top of something that contains or restrains it (such as a dam).
• The distance between the top of sea ice and the water level.
• A 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.

Related

Broader meaning words

• skateboard

Origin

• From being a skateboard with an additional degree of freedom of movement (yaw) and some additional rocking (roll) movement.