to keep someone in (or out), using a blockade, especially ships in a port
to close or block a road etc., using a barricade
A barrier constructed across a road, especially as a military defence
An obstacle, barrier, or bulwark.
A place of confrontation.
To increase the defenses of; to strengthen and secure by military works; to render defensible against an attack by hostile forces.
To increase the nutritional value of food by adding ingredients.
To impart strength or vigor to.
To add spirits to wine to increase the alcohol content.