I grew up, as many Indians do, in an archipelago of tongues.
Power has withered at the center and devolved to an archipelago of fiefdoms where warlords rule without the burdens of governing.
There are political mutinies happening all across America: America is an archipelago of political insurrection.
c.1500, from Italian arcipelago "the Aegean Sea" (13c.), from Greek arkhipelagos, from arkhi- "chief" (see archon) + pelagos "sea" (see pelagic). The Aegean Sea being full of island chains, the meaning was extended in Italian to "any sea studded with islands." Klein, noting the absence of arkhipelagos in ancient or Medieval Greek (the modern word in Greek is borrowed from Italian) believe it is an Italian mistake for Aigaion pelagos "Aegean Sea" (Medieval Latin Egeopelagus), or influenced by that name.
A group of islands near one another.