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.
In 1952: The United States tested the first hydrogen bomb on the Eniwetok atoll in the Pacific Ocean, resulting in a blast equivalent to 10.4 megatons of TNT, hundreds of times more powerful than the atomic bomb dropped on Hiroshima. Lorenzino Estrada, The Arizona Republic, 2 Nov. 2024 Ambitious coral restoration efforts are underway across the atolls of the Maldives — with the help of some hands-on guests. Betsy Andrews, Travel + Leisure, 30 Oct. 2024 In The Island of the Colorblind, the chronicle of his journey to a tiny Micronesian coral atoll called Pingelap, beloved neurologist Oliver Sacks writes about its isolated community of congenital achromats—those who are born completely colorblind. Kanya Kanchana, Longreads, 15 Oct. 2024 There probably isn’t a bad place to fish along Belize’s portion of the Mesoamerican Reef, but the country’s atolls have become hot spots. Graham Averill, Outside Online, 7 May 2022 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

Podcast

Dictionary Entries Near atoll

Cite this Entry

“Atoll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atoll. Accessed 22 Nov. 2024.

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!