The Hawaiian Islands, once known as the Sandwich Islands, form an archipelago of nineteen islands and atolls, numerous smaller islets, and undersea seamounts trending northwest by southeast in the North Pacific Ocean between latitudes 19° N and 29° N. The archipelago takes its name from the largest island in the group and extends some 1500 miles (2400 km) from the Island of Hawaii in the south to northernmost Kure Atoll. Excluding Midway, which is an unincorporated territory of the United States, the Hawaiian Islands form the U.S. State of Hawaii.
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Noun 1. a group of volcanic and coral islands in the central Pacific (synonym) Sandwich Islands (hypernym) archipelago (part-holonym) Polynesia (part-meronym) Hawaii, Aloha State, HI