What is the meaning of Archipelago?

Preceded by the, and often in the form Archipelago: the Aegean Sea.

2. A sea or other body of water with many islands.
4. A group of many islands.

   A sea or other body of water with many islands.

   A group of many islands.

   A thing comprising many other scattered things.

   To scatter or strew (a place, or something) with things that collectively resemble a group of many islands.

   pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) of arquipélago

   Source: wiktionary.org