Noun has 2 senses

• nautical mile(n = noun.quantity) admiralty mile, geographical mile, mi, mile, naut mi - a former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile;


• nautical mile(n = noun.quantity) air mile, international nautical mile, knot, mi, mile, naut mi - a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude;