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ocean

 
/ˈoʊ·ʃən/ n [C/U]

Definition

the large mass of salt water that covers most of the earth’s surface: [U] These mysterious creatures live at the bottom of the ocean. Ocean is also used in the name of the world’s five main divisions of this mass of water: [C] the Atlantic/Pacific/Indian/Arctic/Antarctic Ocean oceanic
 
/ˌoʊ·ʃiˈæn·ɪk/ adj [not gradable]
oceanic conditions
(Definition of ocean n from the Cambridge Academic Content Dictionary © Cambridge University Press)

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