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

: beacon sense 2

Illustration of lighthouse

• lighthouse 1

Examples of lighthouse in a Sentence

Recent Examples on the Web

The research builds on the Fraunhofer lighthouse project MaNiTU and the projects PrEsto and Perle, funded by the Federal Ministry for Economic Affairs and Energy. —Aamir Khollam, Interesting Engineering, 4 Sep. 2025

Be a lighthouse speaker, not a spotlight. —Daniel Fusch, USA Today, 3 Sep. 2025

In September 2023, a 30-year-old man suffered a massive bite to his shoulder seconds after jumping into the water at Sombrero Reef, a popular snorkeling spot that surrounds a lighthouse in the Middle Keys. —David Goodhue, Miami Herald, 2 Sep. 2025

These customers will become your marquee lighthouse customers, advocating for you with their peers. —Harini Gokul, Forbes.com, 2 Sep. 2025

Word History

First Known Use

1606, in the meaning defined at sense 1

Rhymes for lighthouse

• alehouse
• almshouse
• backhouse
• baghouse
• bakehouse
• bathhouse
• bauhaus
• blockhouse
• boathouse
• brewhouse
• bunkhouse
• clubhouse

Kids 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