furlong

noun7

1. •
   A unit of distance equal to one-eighth of a mile (220 yards, or 201.168 metres), now mainly used in measuring distances in farmland and horse racing.

   • Novv vvould I giue a thousand furlongs of Sea, for an Acre of barren ground: Long heath, Brovvne firrs, any thing; the vvills aboue be done, but I vvould faine dye a dry death. — 1610
2. •
   (historical) Synonym of stadion (“a Greek unit of distance based on standardized footraces, equivalent to about 185.4 metres”).
3. •
   (old-fashioned) A unit of land area one furlong square (ten acres, or about four hectares).
4. •
   (dialect, old-fashioned) An undefined portion of an unenclosed field.
5. •
   (dialect) Synonym of land (“any of several portions into which a field is divided for ploughing”).
6. •
   (dialect) Synonym of headland (“unploughed boundary of a field”).
7. •
   (dialect) Synonym of land (“the ground left unploughed between furrows”).