ukase

An authoritative order or decree; an edict.

A proclamation of a czar having the force of law in imperial Russia.

An edict or order, legislative or administrative, emanating from the Russian government.

Hence Any official proclamation.

In Russia, a published proclamation or imperial order, having the force of law.

an order or edict by someone holding absolute authority.

An authoritative proclamation; an edict, especially decreed by a Russian czar or (later) emperor.

Any absolutist order and/or arrogant proclamation

an edict of the Russian tsar