fur ‧ long /ˈfɜːlɒŋ $ ˈfɜːrlɒːŋ/ BrE AmE noun [countable]
[ Language: Old English ; Origin: furlang , from furh 'furrow' + lang 'long' ]
a unit for measuring length, equal to about 201 metres, which is used in horse racing. There are eight furlongs in a mile.