Part of speech: noun
Definition: A field. A unit of surface area (symbol a. or ac.), originally as much as a yoke of oxen could plough in a day; later defined as an area 1 chain (22 yd) by 1 furlong (220 yd), or 4,840 square yards. Equivalent to about 4,046.86 square metres. A large amount (of area).
Part of speech: proper noun
Definition: Old name of a city in modern Israel famed from the Crusades: see Acco.A state in north-western Brazil, bordering Peru and Bolivia.