What is the meaning of prohibition?

noun

• A law forbidding the sale of alcoholic beverages.
  • usage: "in 1920 the 18th amendment to the Constitution established prohibition in the US"
• A decree that prohibits something.
  • synonyms: ban, proscription
• The period from 1920 to 1933 when the sale of alcoholic beverages was prohibited in the United States by a constitutional amendment.
  • synonyms: prohibition era
• Refusal to approve or assent to.
• The action of prohibiting or inhibiting or forbidding (or an instance thereof. )
  • usage: "they were restrained by a prohibition in their charter"; "a medical inhibition of alcoholic beverages"; "he ignored his parents' forbiddance"
  • synonyms: inhibition, forbiddance