Abbr. mi. or mi A unit of length equal to 5,280 feet or 1,760 yards (1,609 meters), used in the United States and other English-speaking countries. Also called land mile, statute mile. See Table at measurement.
A nautical mile.
An air mile.
Sports A race that is one mile long.
A relatively great distance: had to walk for miles in the airport.
[Middle English, from Old English mīl, from Latin mīlia (passuum), a thousand (double paces), a Roman mile, pl. of mīlle, thousand; see gheslo- in Indo-European roots.]