Several mythologies have the notion of a celestial ocean or river, enveloping the world both above the heavenly sphere and below the underworld. // The word mythology (Greek: μυθολογία, from μυθος mythos, a story or legend, and λογος logos, an account or speech) literally means the (oral) retelling of myths – stories that a particular culture believes to be true and that use supernatural events or characters to explain the nature of the universe and humanity. ... The World in plate carrée projection The World In English, world is rooted in a compound of the obsolete words were, man, and eld, age; thus, its oldest meaning is age or life of man. Its primary modern meaning is the planet Earth, especially when capitalized: the World. ... This drawing from an Icelandic manuscript dated around 1750 shows the Earth surrounded by the eight classical spheres. ... // In the study of mythology and religion, the underworld is a generic term approximately equivalent to the lay term afterlife, referring to any place to which newly dead souls go. ...

See also:

• Oceanus
• Uranos
• Styx
• Rasā
• Samudra
• Varuna
• Sea (astronomy)