A barrier constructed across a road, especially as a military defence
An obstacle, barrier, or bulwark.
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
An obstruction causing an embolism: a blood clot, air bubble or other matter carried by the bloodstream and causing a blockage or occlusion of a blood vessel.
The structure on the end of the palp of male arachnids which contains the opening to the ejaculatory duct.