The Monroe doctrine

(Politics) a policy enunciated by President Monroe (Message, Dec. 2, 1823), the essential feature of which is that the United States will regard as an unfriendly act any attempt on the part of European powers to extend their systems on this continent, or any interference to oppress, or in any manner control the destiny of, governments whose independence had been acknowledged by the United States.

See also: doctrine

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
The old America had only one foreign policy, and that was to hold inviolate the Monroe doctrine. European or Asiatic complications scarcely even interested her.
The power of Treaty may yet prove a vast engine of enlargement, when the Monroe doctrine takes its true place as a political fable.
Such were the instruments on which she chiefly relied to sustain her in her repudiation of the Monroe Doctrine and her bold bid for a share in the empire of the New World.
This has allowed China to transform its military and set the stage for an intense security competition, between the world's two great powers, as China gradually seeks to implement its own version of the Monroe doctrine. On the other hand, during the same time period, the US got distracted by a myriad of conflicts, squandering its resources in Iraq and Afghanistan.
The diplomat added that invoking the Monroe Doctrine in the Western hemisphere "is an attack on the sovereignty and free determination of peoples".
wanted to maintain the Monroe Doctrine in the Western Hemisphere.
Instead of invoking the Monroe Doctrine, the US should rethink its Latin American policies.
After its emergence as a world power at the end of the19th century, the US gave a broader interpretation to the Monroe Doctrine to assert that the Western Hemisphere was its exclusive sphere of influence.
Left-wing activists supporting Maduro are occupying the Venezuela embassy in Washington while right-wing pundits paper the town with earnest think pieces about the Monroe Doctrine. Most of this distracts from what's actually happening on the ground in Venezuela.
"The Monroe Doctrine is alive and well," Bolton told the New Yorker's Dexter Filkins.
Adapting insights and inter-disciplinary teaching of the English School and Cambridge contextualists to problems of American hemispheric methodology and historiography, Rossi sheds new light on abridgments of history and the propensity to construct and legitimize whiggish understandings of international law based on simplified tropes of liberal and postcolonial treatments of the Monroe Doctrine. Central to his story is the reinterpretation of the Monroe Doctrine by its supreme early-20th-century interlocutor Elihu Root and other like-minded internationalists.