Definition of atoll noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈætɒl//
; NAmE NAmE//ˈætɔːl//
, NAmE//ˈætɑːl//
jump to other results
an island made of coral and shaped like a ring with a lake of sea water (called a lagoon) in the middle Word Origin early 17th cent.: from Maldivian atoḷu.
See the Oxford Advanced American Dictionary entry: atoll