lighthouse
Americannoun
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a tower or other structure displaying or flashing a very bright light for the guidance of ships in avoiding dangerous areas, in following certain routes, etc.
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either of two cylindrical metal towers placed forward on the forecastle of the main deck of a sailing ship, to house the port and starboard running lights.
noun
Other Word Forms
Etymology
Origin of lighthouse
Explanation
A lighthouse is a building with a warning light that helps boats to navigate safely, especially when it's dark or foggy. Maine is famous for its many lighthouses. Most lighthouses consist of a narrow tower, with a rotating or flashing light at the top, located near the coast. Before the invention of the lighthouse, fires were lit on hillsides to help captains guide their ships, and after permanent ports were built in coastal areas, permanent lighthouses were constructed. These warned sailors of obstacles at sea, rocky coastlines, and harbor entrances — and their designs grew more complex through the 18th century.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
I walk a frozen Bothnian Gulf at Nallikari, an obscured lighthouse, a delinquent lifeguard stand, and makeshift saunas stand on white expanse like archaeology.
From Salon • Mar. 8, 2026
They spin rapidly and generate intense magnetic fields, producing focused beams of radio waves that sweep across space like the beam of a lighthouse.
From Science Daily • Feb. 17, 2026
The Maritime & Coastguard Agency broadcasted warnings to ships in the Solent after the containers came off cargo ship the Baltic Klipper near the Nab tower lighthouse, off Bembridge.
From BBC • Dec. 8, 2025
That leaves the Fed’s deliberations comparable to “trying to bring a boat to shore in the pitch black and having the lighthouse go dark,” Richmond Fed President Thomas Barkin said this week.
From The Wall Street Journal • Nov. 22, 2025
“And living in the tower comes with the job. Like the old lighthouse keepers.”
From "City Spies" by James Ponti
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
