Meaning of MI in English

I. ˈmē noun

Etymology: Medieval Latin, from the syllable sung to this note in a medieval hymn to Saint John the Baptist

Date: 15th century

: the 3d tone of the diatonic scale in solmization

II. abbreviation

1. mile; miles

2. mill

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.