An English unit of land area (symbol: a. or ac.) originally denoting a day's ploughing for a yoke of oxen, now standardized as 4,840 square yards or 4,046.86 square meters.
Any of various similar units of area in other systems.
A wide expanse.
An area of 10,240 square yards or 4 quarters.
A large quantity.
Synonym of land (“the ground left unploughed between furrows; any of several portions into which a field is divided for ploughing”)
Synonym of stadion (“a Greek unit of distance based on standardized footraces, equivalent to about 185.4 metres”)
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.
Synonym of headland (“unploughed boundary of a field”)