Final answer:
A fifth is a measure of volume used to describe the amount of alcoholic beverages. It refers to one-fifth of a gallon or 750 milliliters.
Step-by-step explanation:
A fifth is a measure of volume used to describe the amount of alcoholic beverages. It refers to one-fifth of a gallon or 750 milliliters. So, if you have a bottle of alcohol that is a fifth, it is one-fifth of a gallon or 750 milliliters in size. It is important to note that this term is commonly used in the United States, whereas other countries may have different measurements for their alcohol bottles.