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Synonyms

lighthouse

American  
[lahyt-hous] / ˈlaɪtˌhaʊs /

noun

plural

lighthouses

  1. 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.

  2. 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.

lighthouse British  
/ ˈlaɪtˌhaʊs /

noun

  1. a fixed structure in the form of a tower equipped with a light visible to mariners for warning them of obstructions, for marking harbour entrances, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of lighthouse

First recorded in 1655–65; light 1 + house

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.

This makes the system behave like a flashing cosmic lighthouse.

From Science Daily • Mar. 11, 2026

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

The view from the Grade-II listed house across St Ives Bay to Godrevy lighthouse inspired Woolf to write To the Lighthouse, among other works.

From BBC • Jan. 20, 2026

A short hike to the beach afforded views of the starkly angular lighthouse known as the Charleston Light.

From The Wall Street Journal • Jan. 2, 2026

I hadn’t really thought about it, but our pad really did look like a lighthouse.

From "We Were Here" by Matt De La Peña

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.