Definitions for nautical mile
Random House Webster's College Dictionary
Ref: international nautical mile.
a unit of distance, equal to 6080.20 feet (1853.25 m), formerly used in the U.S. for navigation.
Origin of nautical mile:
nautical mile, naut mi, mile, mi, geographical mile, Admiralty mile(noun)
a former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile
nautical mile, mile, mi, naut mi, knot, international nautical mile, air mile(noun)
a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude
A unit of length corresponding approximately to one minute of arc of latitude along any meridian. By international agreement it is exactly 1,852 metres (approximately 6,076 feet).
Dictionary of Military and Associated Terms
A measure of distance equal to one minute of arc on the Earth
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