Domino theory Meaning, Definition & Usage

  1. noun the political theory that if one nation comes under communist control then neighboring nations will also come under communist control

WordNet


Definitions
  1. . A political theory current in the 1960's, according to which the conversion of one country in South Asia to communism will start a sequential process causing all Asian countries to convert to Communism. The apparent assumption was that an Asian country with a Western orientation was as politically unstable as a domino standing on edge. Used by some as a justification for American involvement in the Vietnam war, 1964-1972.

Webster 1913