n 1  :  a U.S. unit of liquid capacity equal to four quarts or 231 cubic inches or 3.785 liters  2  :  a British unit of liquid and dry capacity equal to four quarts or 277.42 cubic inches or 4.544 liters - called also imperial gallon  .
 
 
 
Similar sounding terms:  Cal·an   clean  clin   clone 
 
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