Definition of Long Island
island 118 miles (190 kilometers) long between Long Island Sound and the Atlantic in southeastern New York state south of Connecticut area 1723 square miles (4462 square kilometers)
LONG ISLAND Defined for English Language Learners
Definition of Long Island for English Language Learners
: island of the U.S., in New York
Long Island Sound : part of the Atlantic Ocean between the U.S. states of New York and Connecticut
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