oceanographyPronunciation: /ˌəʊʃəˈnɒgrəfi/Definition of oceanography noun [mass noun] the branch of science that deals with the physical and biological properties and phenomena of the sea. Derivatives oceanographer noun oceanographicPronunciation: /-nəˈgrafɪk/ adjective oceanographicalPronunciation: /-nəˈgrafɪk(ə)l/ adjective oceanography in other Oxford dictionaries Definition of oceanography in the US English dictionary