1.a law forbidding the sale of alcoholic beverages;
in 1920 the 18th amendment to the Constitution established prohibition in the US
2.a decree that prohibits something
3.the period from 1920 to 1933 when the sale of alcoholic beverages was prohibited in the United States by a constitutional amendment
4.refusal to approve or assent to
5.the action of prohibiting or inhibiting or forbidding (or an instance thereof);
they were restrained by a prohibition in their charter