Definition of iron curtain
1
: a political, military, and ideological barrier that cuts off and isolates an area
specifically, often capitalized
: one formerly isolating an area under Soviet control
2
: an impenetrable barrier
the iron curtain between the ego and the unconscious— C. J. Rolo
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Merriam-Webster unabridged
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Time Traveler for iron curtain
The first known use of iron curtain was in 1819
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