1. The act of forbidding or interdicting; a declaration to hinder some action; interdict.
The law of God in the ten commandments consists mostly of prohibitions; ""thou shalt not do such a thing.""
2. In law, a writ of prohibition, is a writ issuing from a superior tribunal, directed to the judges of an inferior court, commanding them to cease from the prosecution of a suit. by ellipsis, prohibition is used for the writ itself.