'ocean' originates from Greek, specifically the word 'ōkeanos,' where 'ōkeanos' meant 'great stream encircling the earth's disc.'

'ocean' changed from the Old French word 'occean' and eventually became the modern English word 'ocean.'

Initially, it meant 'the great stream encircling the earth's disc,' but over time it evolved into its current meaning of 'the vast body of salt water that covers almost three-quarters of the earth's surface.'