Regular coffee refers to a standard cup or mug of brewed coffee that is made from roasted and ground coffee beans. It typically contains one shot (or 1 oz) of espresso, which is diluted with hot water to create an average strength coffee drink. The term "regular" in this context means the standard or typical version of a cup of coffee, as opposed to other variations such as decaf, flavored, or specialty coffees like lattes and cappuccinos.