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• Monroe Doctrine
  Monroe Doctrine

  noun

  the policy, as stated by President Monroe in 1823, that the U.S. opposed further European colonization of and interference with independent nations in the Western Hemisphere.
• Monroe doctrine
  Monroe doctrine

  noun

  a principle of US foreign policy that opposes the influence or interference of outside powers in the Americas

Monroe Doctrine

American  

noun

U.S. History.

1. the policy, as stated by President Monroe in 1823, that the U.S. opposed further European colonization of and interference with independent nations in the Western Hemisphere.

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Monroe doctrine British  

noun

1. a principle of US foreign policy that opposes the influence or interference of outside powers in the Americas

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Monroe Doctrine Cultural  

1. A statement of foreign policy issued by President James Monroe in 1823, declaring that the United States would not tolerate intervention by European nations in the affairs of nations in the Americas. Monroe also promised that the United States would not interfere with European colonies already established or with governments in Europe.

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Example Sentences

But Hamilton’s belief that the Western Hemisphere should be closed to European meddling was memorialized in 1823’s Monroe Doctrine External link.

From Barron's • Jan. 18, 2026

Now he's trying out a new name for the Monroe Doctrine, which has been a foundation of US policy in Latin America for two centuries.

From BBC • Jan. 8, 2026

This is, after all, the logical extension of the Monroe Doctrine.

From The Wall Street Journal • Jan. 6, 2026

In 1904, the United States announced the “Roosevelt Corollary” to the Monroe Doctrine.

From Salon • Dec. 9, 2025

It can stand in for anything—a stuffed piranha, existentialism, the Monroe Doctrine, or buttered toast.

From "Woe Is I" by Patricia T. O'Conner