1. a tall tower with a bright light at the top, built on or near the shore to guide ships and warn them of dangerous areas

Examples

• The lighthouse beam swept across the dark ocean every few seconds.
• Ships rely on the lighthouse to navigate safely through the rocky coastline.
• The old lighthouse has been guiding vessels for over a century.
• We climbed to the top of the lighthouse for a spectacular view of the harbor.
• The lighthouse keeper maintained the light every night without fail.
• During the storm, the lighthouse was the only visible landmark for miles.