megapolitan

adjective1

1. •
   Of or pertaining to a megapolis (“a very large city or urban complex”).

   • Of the intellectual nature of Bosville, mention has been made already. It is, as we have seen, […] megapolitan, metropolitan, cosmopolitan,[…]. — 1859

noun2

1. •
   An inhabitant of a megapolis.
2. •
   Synonym of megapolis.

adjective1

1. •
   Of, pertaining to, or from the ancient city of Megalopolis (now Megalopoli) in Greece.

   • The upshot is, we are guided by a party of shock-headed Arcadians, who are going in the direction of the excavations, and a Megapolitan boy who has probably an eye to gain. — 1902

noun1

1. •
   An inhabitant of the ancient city of Megalopolis (now Megalopoli) in Greece.

   • The Megapolitans whose City did abide the siege, were compelled to pay as a fine for their rebellion twenty talents to the Athenians, and the Aeolians. — 1670