- a unit of distance, equal to 220 yards (201 meters) or ⅛ mile (0.2 km). Abbreviation: fur.
- a unit of length equal to 220 yards (201.168 metres)
Old English furlang measure of distance of roughly 220 yards, originally the length of a furrow in the common field of 10 acres, from furh “furrow” + lang “long.” The “acre” of the common field being variously measured, the furlong was fixed 9c. on the classical stadium, one-eighth of a Roman mile.