Military Defense Structures

noun a fortified outpost or gateway, usually at the entrance of a castle or walled city

• The Barbican Centre is a major performing arts venue in London.
• Let's meet at the Barbican for the concert tonight.
• I love hanging out at the Barbican, it's so chill.
• Her words were like barbican, sharp and cutting.

noun a tower or building from which a lookout keeps watch or guards against danger

• The soldiers stationed at the watchtower scanned the horizon for any signs of movement.
• Let's climb up to the watchtower to get a better view of the sunset.
• I heard there's a secret party happening at the old watchtower tonight.
• The CEO acted as a watchtower, overseeing all the company's operations from a distance.