Besiege/bɪˈsiːdʒ/ Definition 1 of 2Pro Tip 1/3Warfare Context Use 'besiege' to describe military tactics in historical or fantasy contexts. The ancient city was besieged until its walls crumbled. Pro Tip 2/3Extended Siege 'Besiege' implies a prolonged effort, not a quick assault. The soldiers prepared to besiege the castle through the winter. Pro Tip 3/3Active Confinement To 'besiege' suggests active containment, preventing entry or escape. Rebels besieged the port, cutting off all trade routes.