a tower with a light that gives warning of shoals to passing ships
"The old lighthouse stood on the rocky cliff, its beam sweeping across the dark water to warn ships of the dangerous shoals below."
A tower or other structure exhibiting a light or lights to warn or guide sailors.
"The old lighthouse stood on the rocky cliff, flashing its beam every few seconds to warn sailors of the dangerous shoals below."
In plain English: A lighthouse is a tall tower with a bright light on top that warns ships they are near dangerous land so they don't crash.
"The lighthouse stood tall on the rocky cliff to guide ships safely through the stormy night."
Usage: A lighthouse serves as a stationary beacon specifically designed to warn ships of nearby coastlines and dangerous rocks while guiding them safely through harbors. Unlike temporary signals, it is typically built on land or rocky outcrops where its fixed position makes it highly effective for maritime navigation.
The word lighthouse is a straightforward compound formed from English words meaning light and house. It describes a structure built to emit light as a navigational aid for ships at sea.