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 atoll is also an experimental site for innovative technologies and methods to combat climate change. Sarah Kuta, Smithsonian Magazine, 7 Jan. 2025 The rest of the top 10 rankings went to island escapes, including American Samoa, a US territory that includes seven South Pacific islands and atolls near Fiji; the Canary Islands, a Spanish archipelago off the coast of northwest Africa, Portugal's the Azores; and Turks and Caicos in the Caribbean. Hannah Towey, Condé Nast Traveler, 10 Dec. 2024 Courtesy Kellie Carlson The attack The attack unfolded as Carlson and her family — all avid divers — were at the Lighthouse Reef atoll in the Caribbean Sea. Morgan Chesky, NBC News, 31 Dec. 2024 These include Pacific atolls vaporized in mile-high explosions. Thomas Bass author, Newsweek, 19 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

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Cite this Entry

“Atoll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atoll. Accessed 3 Mar. 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

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