nounhistorical South African
Originally: a liquid measure used in Germany and the Low Countries which varied in different places from about 30 to 44 imperial gallons (136 to 200 litres). In later use also: a liquid measure used in South Africa, typically 30 to 34 gallons (136 to 154 litres).
Late Middle English. From (i) Middle Dutch āme kind of liquid measure (Dutch aam, also denoting a tun holding this quantity).