<p><strong>Noun</strong></p><ul><li>A common unit of capacity in English-speaking countries, equal to four quarts.</li><li>The U.S. standard gallon is equal to 231 cubic inches (3.7853 liters).</li><li>The British imperial gallon is equal to 277.42 cubic inches (4.546 liters).</li><li>Abbreviated as "gal."</li></ul>