Driving 300 miles on one tank of gas was cutting it close, but we arrived safely.
The hardest thing I ever did was run the 25th mile of a 26 mile long marathon.
… not less than 20 miles per hour on all portions of the thruway system.
Used in the Ending of Sentence
From a semiconstructed building in the middle of a cornfield into the bathroom floor of his cell in the Altiplano prison, its length is greater than a mile.
Meaning of miles for the defined word.
Grammatically, this word "miles" is a noun, more specifically, a noun form.