Definition of archipelago noun from the Oxford Advanced Learner's Dictionary

 

archipelago

 noun
noun
BrE BrE//ˌɑːkɪˈpeləɡəʊ//
 
; NAmE NAmE//ˌɑːrkɪˈpeləɡoʊ//
 
(pl. archipelagos, archipelagoes) Other geographic regions
 
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a group of islands and the sea surrounding them the Indonesian archipelago See related entries: Other geographic regions Word Origin early 16th cent.: from Italian arcipelago, from Greek arkhi- ‘chief’ + pelagos ‘sea’. The word was originally used as a proper name (the Archipelago ‘the Aegean Sea’): the general sense arose because the Aegean Sea is known for its large numbers of islands.
See the Oxford Advanced American Dictionary entry: archipelago