noun

• 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.
• (Chester, historical) An area of 10,240 square yards or 4 quarters.
• Any of various similar units of area in other systems.
• (informal, usually in the plural) A wide expanse.
• (informal, usually in the plural) A large quantity.
• (obsolete) A field.
• (obsolete) The acre's breadth by the length, English units of length equal to the statute dimensions of the acre: 22 yds (≈20 m) by 220 yds (≈200 m).
• (obsolete) A duel fought between individual Scots and Englishmen in the borderlands.
• A port city in northern Israel, and the holiest city in the Baháʼí Faith.
• A state of the North Region, Brazil. Capital: Rio Branco
• A surname.