a policy of extending a country's power and influence through colonization, use of military force, or other means
帝国主义
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the struggle against imperialism 反帝斗争
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figurative 〈喻〉French ministers protested at US cultural imperialism .法国部长抗议美国的文化帝国主义。
〈主史〉 帝制,帝王统治。