nautical mile
noun
1 nautical mile
A former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile.
synonyms: Admiralty mile, geographical mile, mi, mile, naut mi.
2 nautical mile
A unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude.
synonyms: air mile, international nautical mile, mi, mile, naut mi.
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