From WordNet (r) 3.0 (2006):
MI
n 1: destruction of heart tissue resulting from obstruction of
the blood supply to the heart muscle [syn: myocardial
infarction, myocardial infarct, MI]
2: a former British unit of length equivalent to 6,080 feet
(1,853.184 meters); 800 feet longer than a statute mile [syn:
nautical mile, naut mi, mile, mi, geographical
mile, Admiralty mile]
3: a unit of length used in navigation; exactly 1,852 meters;
historically based on the distance spanned by one minute of
arc in latitude [syn: nautical mile, mile, mi, naut
mi, knot, international nautical mile, air mile]
4: a unit of length equal to 1,760 yards or 5,280 feet; exactly
1609.344 meters [syn: mile, statute mile, stat mi,
land mile, international mile, mi]
5: a midwestern state in north central United States in the
Great Lakes region [syn: Michigan, Wolverine State,
Great Lakes State, MI]
6: the government agency in the United Kingdom that is
responsible for internal security and counterintelligence on
British territory [syn: Security Service, MI, Military
Intelligence Section 5]
7: the government agency in the United Kingdom that is
responsible for internal security and counterintelligence
overseas [syn: Secret Intelligence Service, MI, Military
Intelligence Section 6]
8: the syllable naming the third (mediant) note of any major
scale in solmization