mile ‧ age /ˈmaɪlɪdʒ/ BrE AmE noun
1 . [countable usually singular, uncountable] the number of miles a vehicle has travelled since it was made:
Always check the mileage before you buy a secondhand car.
2 . [countable usually singular, uncountable] the number of miles someone travels in a vehicle in a particular period of time:
Look for a car hire agreement that offers unlimited mileage.
3 . [countable usually singular, uncountable] the number of miles a vehicle can travel using a particular amount of ↑ fuel :
The car’s average mileage is 22.73 miles per gallon.
4 . [uncountable] the amount of use or advantage you get from something:
The newspapers wanted to get as much mileage from the story as they could.
5 . [countable usually singular, uncountable] ( also mileage allowance ) an amount of money that is paid to someone for each mile that they travel when they use their own car for work:
Community nurses are paid a mileage allowance.
6 . [uncountable] the number of miles covered by a country’s roads or railways:
plans to treble the country’s railway mileage