n destruction of heart tissue resulting from obstruction of the blood supply to the heart muscle n a former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile n a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude n a unit of length equal to 1,760 yards or 5,280 feet; exactly 1609.344 meters n a midwestern state in north central United States in the Great Lakes region n the government agency in the United Kingdom that is responsible for internal security and counterintelligence on British territory n the government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas n the syllable naming the third (mediant) note of any major scale in solmization