Definition of mash

The word "mash" originates from the Middle English word "meshen," which means "to press," "to squeeze," or "to crush." It comes from the Old English word "myssan," which has similar meanings. In the brewing process, mashing refers to the first step in making beer. This step involves steeping grains, such as barley, in hot water to convert the starches into fermentable sugars. The resulting thick liquid, called wort, is then boiled before fermentation can begin. The term "mash" can also refer to the process of pressing grapes in winemaking, as well as mushed potatoes or other foods that have been mashed or crushed. Its general meaning is to crush, squeeze, or grind something to extract liquid or flavor. In modern use, "mash" often refers specifically to mashing grains in brewing, but the etymological roots of the word are much broader.