atoll

noun

ˈa-ˌtȯl How to pronounce atoll (audio)
-ˌtäl,
-ˌtōl,
ˈā- How to pronounce atoll (audio)
: a coral island consisting of a reef surrounding a lagoon

Illustration of atoll

Illustration of atoll

Did you know?

If you are lucky enough to sail south and west of Sri Lanka in the Indian Ocean, you'll find the Maldives, a group of about 1,200 coral islands and sandbanks that form the Republic of Maldives. Many islands in that independent nation demonstrate the archetypal atoll, and geographers often use them to point out the characteristic features of such coral islands. Given how prevalent atolls are there, it isn't surprising that atoll comes from the name for that kind of island in Divehi, the official language of the Maldives.

Examples of atoll in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The project, launched on the atoll of Woleai in the Federated States of Micronesia, is approximately 400 miles south of Guam, a U.S. territory and military hub considered key to Washington's ability to project power in the Asia-Pacific. Micah McCartney, MSNBC Newsweek, 27 May 2025 In French Polynesia After touching down on the pristine atoll of Tetiaroa, once the retreat of Tahitian royalty, going barefoot on the warm, powder-soft sands will feel less like a choice and more like a natural response. Emese MacZko, Forbes.com, 23 May 2025 On a coral atoll in the Western Pacific, the device grew slowly. William J. Broad, New York Times, 19 May 2025 The atoll, located about 140 miles from the Philippines' Luzon Island, is a rich fishing ground and a long-standing flashpoint in territorial disputes. Mark R. Weaver, Newsweek, 4 Dec. 2024 See All Example Sentences for atoll

Word History

Etymology

Divehi (Indo-Aryan language of the Maldive Islands) atolu

First Known Use

1625, in the meaning defined above

Time Traveler
The first known use of atoll was in 1625

Browse Nearby Words

Podcast

Cite this Entry

“Atoll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atoll. Accessed 29 Jun. 2025.

Kids Definition

atoll

noun
ˈa-ˌtȯl How to pronounce atoll (audio) -ˌtäl How to pronounce atoll (audio)
-ˌtōl,
ˈā-
: a coral island consisting of a coral reef surrounding a lagoon

More from Merriam-Webster on atoll

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!