the executive branch of the government of Russia or of the Soviet Union, especially in regard to its foreign affairs.
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 < German (now obsolete) < an unattestested outcome of Old Russian*kremlĭnĭ, derivative of kremlĭ (Russiankremlʾ, gen kremlyá) citadel, akin to Old RussianKromŭ the citadel of Pskov, Ukrainiankróma partition, Russiankromá, krómka edge, border
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.