Definitions:

1. An authoritative decree or proclamation issued by a person in a position of power, especially in a monarchy or a government, without the need for approval by any other authority. NOUN
   • The ukase prohibited the sale of alcohol on Sundays.
2. In Russia, a published proclamation or imperial order, having the force of law. NOUN
   • The ukase granted the nobility new privileges.
3. Most often associated with the former Russian Empire, where it was an edict of the Russian government. NOUN
   • The ukase forbade the use of firearms without a license.
4. Refers to an authoritative decree or order, especially one issued by a Russian tsar or government. NOUN
   • The tsar's ukase declared that all serfs were to be emancipated.
5. Used to describe any edict or command that is issued with unquestionable authority. NOUN
   • The ukase required all citizens to attend church on Sundays.

Synonyms:

• decree
• directive
• edict
• ruling