ecumenopolis

noun
ecu·​me·​nop·​o·​lis | \ ˌekyəmə̇ˈnäpələs, eˌkyüm-\
plural -es

Definition of ecumenopolis

: a single city encompassing the whole world that is held to be a possibility of the future

History and Etymology for ecumenopolis

New Greek oikoumenopolis, from Greek oikoumenē world + -o- + -polis

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