An atoll (/ ˈæt.ɒl, - ɔːl, - oʊl, əˈtɒl, - ˈtɔːl, - ˈtoʊl /) [1] is a ring-shaped island, including a coral rim that encircles a lagoon. There may be coral islands or cays on the rim. [2][3] Atolls are located in warm …

atoll, coral reef enclosing a lagoon. Atolls consist of ribbons of reef that may not always be circular but whose broad configuration is a closed shape up to dozens of kilometres across, enclosing a lagoon …

The meaning of ATOLL is a coral island consisting of a reef surrounding a lagoon. Did you know?

ATOLL definition: a ring-shaped coral reef or a string of closely spaced small coral islands, enclosing or nearly enclosing a shallow lagoon. See examples of atoll used in a sentence.

An atoll is a ring-shaped coral reef, island, or series of islets. The atoll surrounds a body of water called a lagoon.

Atolls are very small islands, barely two meters above sea level. Atolls form when islands poke through the ocean surface and coral grows around them. These examples are from corpora and from …

An atoll is created as a coral reef builds up around an eroding volcanic island. n. An island or chain of islets connected by a coral reef that nearly or entirely encloses a lagoon.

Definition of atoll noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

May 10, 2025 · An atoll stands as one of Earth’s most remarkable natural formations—a ring-shaped coral reef encircling a lagoon where once stood a volcanic island. These living geological wonders …

An atoll is a ring of coral rock, or a group of coral islands surrounding a lagoon. Collins COBUILD Advanced Learner’s Dictionary. Copyright © HarperCollins Publishers