An obstacle, barrier, or bulwark.
A barrier constructed across a road, especially as a military defence
A place of confrontation.
to close or block a road etc., using a barricade
to keep someone in (or out), using a blockade, especially ships in a port
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.
The vertical distance between the waterline and the uppermost watertight deck of a vessel.