noun🔗ShareAtolleA type of island consisting of a ribbon reef that nearly or entirely surrounds a lagoon and supports, in most cases, one to many islets on the reef platform. Atolls have a unique geology, so not all islands with a reef and a lagoon are atolls"The airplane flew over a chain of beautiful atolls, each a ring of tiny islands surrounding a calm, blue lagoon. "Das Flugzeug flog über eine Kette wunderschöner Atolle, jedes ein Ring aus winzigen Inseln, die eine ruhige, blaue Lagune umgaben.geographygeologyenvironmentworldnatureoceanChat with AIVocabulary GamePractice Reading