1.  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;
is a kind of nautical linear unit

2.  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;
is a kind of nautical linear unit

admiralty mile, air mile, car mile, geographical mile, half mile, international nautical mile, land mile, last mile, mile, nautical, nautical chain, nautical linear unit, nautical signal flag, passenger mile, quarter mile, roman mile, sea mile, square mile, statute mile, swedish mile, ton mile, traffic mile