ATOLL Meaning of ATOLL in English at ‧ oll /ˈætɒl $ ˈætɒːl, ˈætɑːl/ BrE AmE noun [countable] [ Date: 1600-1700 ; Language: Maldivian ; Origin: atolu ] a ↑ coral island in the shape of a ring Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012