the executive branch of the government of Russia or of the Soviet Union, esp. in regard to its foreign affairs.
b.
the citadel of Moscow, including within its walls the chief offices of the Russian and, formerly, of the Soviet government.
Origin: 1655–65; earlier Kremelien < G (now obs.) < an unattestested outcome of ORuss *kremlĭnĭ, deriv. of kremlĭ (Russ kremlʾ, gen kremlyá) citadel, akin to ORuss Kromŭ the citadel of Pskov, Ukrainian króma partition, Russ kromá, krómka edge, border
The citadel of Moscow, housing the offices of the Russian government and formerly those of the Soviet government. The outer walls of the compound date to the 15th century.
The government of Russia and formerly that of the Soviet Union.
kremlin The citadel of a Russian city.
[Obsolete German Kremelin, from Old Russian *kremlĭnŭ, separate, from kremlĭ, a separate place, citadel.]
1662, from Fr. kremlin, from Rus. krem'l "citadel, fortress," of Tartar origin. Originally the citadel of any Rus. city, now esp. the one in Moscow. Used metonymically for "government of the U.S.S.R." from 1933.