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

'ōkeanós' transformed into the Latin word 'oceanus,' and eventually became the modern English word 'ocean' through Old French.

Initially, it meant 'great stream encircling the earth,' but over time it evolved into its current meaning of 'large body of saltwater.'