Dictionary definition: iron curtain

iron curtain. The phrase had its origin in the 18c with reference to a safety device lowered in theatres between the stage and the auditorium. Its figurative use referring to any impenetrable barrier evolved in the early 19c and it acquired its classic meaning in the 20c when used of the East-European sphere of influence exercised in the postwar years by the Soviet Union. The locus classicus (though not the first use, which was in 1920) was a speech given by ...

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