quart -
A unit of liquid capacity equal to two pints; one-fourth quarter of a gallon. Equivalent to 1. 136 liters in the UK and 0. 946 liter liquid quart or 1. 101 liters dry quart in the U. S.
quart -
A fourth; a quarter; hence, a region of the earth.
Wikipedia
The quart is a unit of volume equal to a quarter of a gallon, two pints, or four cups. Since gallons of various sizes have historically been in use, quarts of various sizes have also existed; see gallon for further discussion. Three of these kinds of quarts remain in current use, all approximately equal to one litre.