Definition of Staten Island
1 island of southeastern New York southwest of the mouth of the Hudson River
2 or formerly Richmond \ˈrich-mənd\play borough of New York City including Staten Island population 468,730 ◆Staten Island is the smallest borough of New York City.
STATEN ISLAND Defined for English Language Learners
Definition of Staten Island for English Language Learners
: part of the U.S. city of New York, in the state of New York
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