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n. the total distance, in kilometres, travelled

n. the number of kilometres travelled by a vehicle on a certain volume of fuel

n. an allowance for travel expenses at a specified rate per kilometre

"Only drawback (as with all things constitutional in this country) is that "your kilometrage may vary" as usual -- bi provincial / territorial jurisdiction, as well as bi the numbers (typically "where numbers warrant" -- which could be interesting), etc."

mileage