1. tall structures with bright lights built on or near coasts to guide ships and warn them of dangerous areas

Examples

• The lighthouses along the rocky coast helped ships navigate safely through the fog.
• Many historic lighthouses have been converted into museums.
• The captain could see three lighthouses from the ship’s deck.
• Automated lighthouses have replaced most of the old keeper-operated ones.
• Tourists love visiting the picturesque lighthouses on the Maine coast.
• The storm damaged several lighthouses along the shoreline.
• Modern GPS has reduced ships’ dependence on lighthouses for navigation.