A measure of capacity, both in dry and in liquid measure; the fourth part of a gallon; the eighth part of a peck; two pints. Note: In imperial measure, a quart is forty English fluid ounces; in wine measure, it is thirty-two American fluid ounces. The United States dry quart contains 67.20 cubic inches, the fluid quart 57.75. The English quart contains 69.32 cubic inches.