a British gallon used in liquid and dry measurement equivalent to 1.2 U.S. gallons, or 4.54 liters.
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- imperial beach,
- imperial bushel,
- imperial eagle,
- imperial jade,
- imperial moth,
- imperial presidency,
- imperial valley,
- imperial war museum
Origin of imperial gallon
First recorded in 1830–40
Also called British gallon.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a formal name for gallon (def. 1)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012