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

'oceanus' transformed into 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 'a vast body of salt water'.