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1. A large cask for liquids, especially wine.
2. A measure of liquid capacity, especially one equivalent to approximately 252 gallons (954 liters).
[Middle English, from Old English tunne, possibly of Celtic origin.]
1. a large beer cask
2. (Units) a measure of capacity, usually equal to 252 wine gallons
3. (Brewing) a cask used during the manufacture of beer
vb, tuns, tunning or tunned
(Brewing) (tr) to put into or keep in tuns
[Old English tunne; related to Old High German, Old Norse tunna, Medieval Latin tunna]
n., v. tunned, tun•ning. n.
1. a large cask for holding liquids, esp. wine, ale, or beer.
2. a measure of liquid capacity, usu. equivalent to 252 gallons.v.t.
3. to put into or store in a tun or tuns.
[before 900; Middle English tunne, Old English, c. Old Frisian, Middle Dutch, Middle Low German tunne, tonne, late Old Norse tunna, perhaps all ultimately < early Medieval Latin tunna cask, of uncertain orig.]
Tuna large quantity—Johnson, 1755.
Examples: tun of bliss, 1603; of gold, 1603; of gracious health, 1447.
Past participle: tunned
A unit of liquid capacity. One definition gives eight thirty-five-and-a-half-gallon barrels (252 gallons) per tun.