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
A means of keeping or remaining safe.
Coverage.
The process of keeping (something or someone) safe.
The state of being safe.
An instance of a security token associated with a resource (such as a file).
Restrictions on foreign competitors which limit their ability to compete with domestic producers of goods or services.
A means, such as a condom, of preventing pregnancy or sexually transmitted disease.
Immunity from harm, obtained by illegal payments, as bribery or extortion.