OED staff 1989. OED staff (1989). "ukase, n." (Second ed.). Earlier version first published in New English Dictionary, 1921.
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One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Ukaz". Encyclopædia Britannica. Vol. 27 (11th ed.). Cambridge University Press. p. 564.