Blockade/blɑːˈkeɪd/ Definition 1 of 3Pro Tip 1/3War Tactics Blockade as a strategy is often used in military contexts, typically during war. The naval blockade crippled the enemy's supply lines. Pro Tip 2/3Economic Pressure Blockades can be economic sanctions intended to pressure a country or region. The international blockade was imposed to force policy changes. Pro Tip 3/3Duration Blockades often imply a sustained effort over a period of time rather than a one-off event. The blockade lasted several months.