Illustration of lighthouse
- lighthouse 1
lighthouse
noun
light·house
ˈlīt-ˌhau̇s 
1
: a structure (such as a tower) with a powerful light that gives a continuous or intermittent signal to navigators
2
Examples of lighthouse in a Sentence
Recent Examples on the Web
The planet, designated PSR J2322-2650b, has a mass around that of Jupiter and orbits a dead star called a pulsar that blasts out twin jets of radiation that sweep across the universe like a cosmic lighthouse.
—
Robert Lea, Space.com, 16 Dec. 2025
Other offices in the building included the Internal Revenue Service; the Bureau of Animal Industry; lighthouse, locomotive and steamboat inspections; and even a department for oleomargarine, to protect the dairy industry from being undercut by the cheaper butter substitute.
—John Diedrich, jsonline.com, 11 Dec. 2025
Other highlights that Conde Nast readers highlighted include the 26 miniature replicas of lighthouses around the world placed along the shoreline and wildlife viewing opportunities along the Mojave Sunset Trail.
—Michael Salerno, AZCentral.com, 11 Dec. 2025
Spot the Sullivan’s Island Lighthouse Built in 1962 and officially called the Charleston Light, the black-and-white lighthouse that rises above the beach has become synonymous with the island—with most locals referring to it as the Sullivan’s Island Lighthouse.
—Betsy Cribb Watson, Southern Living, 7 Dec. 2025
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Robert Lea, Space.com, 16 Dec. 2025
Other offices in the building included the Internal Revenue Service; the Bureau of Animal Industry; lighthouse, locomotive and steamboat inspections; and even a department for oleomargarine, to protect the dairy industry from being undercut by the cheaper butter substitute.
—John Diedrich, jsonline.com, 11 Dec. 2025
Other highlights that Conde Nast readers highlighted include the 26 miniature replicas of lighthouses around the world placed along the shoreline and wildlife viewing opportunities along the Mojave Sunset Trail.
—Michael Salerno, AZCentral.com, 11 Dec. 2025
Spot the Sullivan’s Island Lighthouse Built in 1962 and officially called the Charleston Light, the black-and-white lighthouse that rises above the beach has become synonymous with the island—with most locals referring to it as the Sullivan’s Island Lighthouse.
—Betsy Cribb Watson, Southern Living, 7 Dec. 2025
See All Example Sentences for lighthouse
Cite this Entry
“Lighthouse.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lighthouse. Accessed 22 Dec. 2025.
Copy CitationKids Definition
lighthouse
noun
light·house
-ˌhau̇s
: a tower with a powerful light at the top that is built on or near the shore to guide sailors at night
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