Definition of furlong noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈfɜːlɒŋ//
; NAmE NAmE//ˈfɜːrlɔːŋ//
, NAmE//ˈfɜːrlɑːŋ//
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(especially in horse racing) a unit for measuring distance, equal to 220 yards or 201 metres; one eighth of a mile Word OriginOld English furlang, from furh ‘furrow’ + lang ‘long’. The word originally denoted the length of a furrow in a common field (formally regarded as a square of ten acres). It was also used as the equivalent of the Roman stadium, one eighth of a Roman mile, which led to the current sense. Compare with stadium.
See the Oxford Advanced American Dictionary entry: furlong