1. a small fort or defensive structure, typically made of logs or concrete
Usage: military; historical
2. a reinforced concrete building designed to provide protection from explosions or radiation
Usage: technical

Examples

• The colonial settlers built a blockhouse to defend against attacks.
• The old blockhouse still stands on the hill overlooking the valley.
• Engineers constructed a blockhouse near the rocket launch pad.
• The concrete blockhouse protected workers from dangerous radiation.
• Soldiers took refuge in the blockhouse during the bombardment.
• The museum displays artifacts from the frontier blockhouse.