A blockade refers to an act of sealing off an area or cutting off supplies from entering or leaving a certain place. It is usually done as a means of exerting pressure on a particular region or government.
Related terms
Embargo: A complete ban on trade with a particular country or region.
Siege: The surrounding of a city or fortress with military forces in order to force its surrender.
Naval Blockade: A blockade conducted at sea using naval vessels to prevent goods, weapons, or people from entering or leaving a port.