2.An amount measured in gallons.
3.SALESMAN: You need two gallons.
4.Gasoline is sold by the gallon.
5.How many gallons do you want ?
6.Will ten gallons is enough ?
7.a barrel of beer is 31 gallons and a barrel of oil is 42 gallons.
9.a British unit of capacity equal to 9 imperial gallons.
10.A container with a capacity of one gallon.