domino theory

noun

Definition of domino theory

1 : a theory that if one nation becomes Communist-controlled the neighboring nations will also become Communist-controlled
2 : the theory that if one act or event is allowed to take place a series of similar acts or events will follow

Recent Examples of domino theory from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'domino theory.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of domino theory

from the fact that if dominoes are stood on end one slightly behind the other, a slight push on the first will topple the others


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