nautical mile

noun

Definition of nautical mile

:any of various units of distance used for sea and air navigation based on the length of a minute of arc of a great circle of the earth and differing because the earth is not a perfect sphere: such as
a :a British unit equal to 6080 feet (1853.2 meters)
b :an international unit equal to exactly 1852 meters (6076.115 feet or 1.15 statute miles) used officially in the U.S. since July 1, 1954

First Known Use of nautical mile

1830


NAUTICAL MILE Defined for English Language Learners

nautical mile

noun

Definition of nautical mile for English Language Learners

  • : a unit of distance equal to 1,852 meters or 1.15 miles that is used for sea and air travel


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