ドミノ理り論ろん

noun

domino theory

Cold War-era political theory that if one country falls to communism, neighboring countries will follow like a row of dominoes.

• ドミノ理り論ろんは冷れい戦せん時じ代だいのアメリカの外がい交こう政せい策さくに大おおきな影えい響きょうを与あたえた。

  The domino theory greatly influenced American foreign policy during the Cold War.