Prohibition: A law or regulation that forbids something, specifically the legal prohibiting of the manufacture and sale of alcohol, particularly in U.S from 1920-1933.
Women's Christian Temperance Union (WCTU): An organization that was influential in the prohibition movement; one of the first organizations of women devoted to social reform with a program that "linked the religious and secular through concerted and far-reaching reform strategies based on applied Christianity."
Eighteenth Amendment: The amendment that prohibited the manufacture, sale, or transportation of alcoholic beverages in U.S.