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English definition of “ocean”

ocean

noun [C/U]  /ˈoʊ·ʃən/ us  
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
adjective [not gradable]  /ˌoʊ·ʃiˈæn·ɪk/ us  
oceanic conditions
(Definition of ocean from the Cambridge Academic Content Dictionary © Cambridge University Press)
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