Megapolitan

Of the intellectual nature of Bosville, mention has been made already. It is, as we have seen, […] megapolitan, metropolitan, cosmopolitan,[…].

Source: wiktionary

Is the school culture, that child of nineteenth-century Protestant laissez faire and rural America, of an emerging and industrial and urban society and of an economy of scarcity, relevant to the multi-ethnic, multi-racial, and multi-religious post-industrial society of today, with its metropolitan and megapolitan settlement pattern and its economy of affluence-with-poverty? Which culture does today's child really need to know?

Source: wiktionary

The nation's southernmost transcontinental Interstate, I-10, serves as the Gulf Coast's "Main Street." Every major city in the megapolitan area lies along its path. […] Megapolitan Areas are integrated networks of metropolitan and micropolitan areas.

Source: wiktionary

In the US there are 10 megapolitan regions, defined as clustered networks of metropolitan regions that either have populations of more than 10 million or will exceed that number, on current growth projections, by 2010.

Source: wiktionary