Monroe doctrine
- a principle of US policy, originated by President James Monroe, that any intervention by external powers in the politics of the Americas is a potentially hostile act against the US门罗主义（美国总统詹姆斯·门罗提出的美国政策原则, 认为任何外部力量对美洲政治干涉都是对美国的潜在敌对行为）。