1. domino theory - Noun
2. Domino theory - Proper noun
the political theory that if one nation comes under communist control then neighboring nations will also come under communist control
Source: WordNetHere is the real domino theory - gay man to gay man, bisexual man to straight woman, addict mother to newborn baby, they all fall down and someday it will come to you. Anna Quindlen
Vietnam was a lie but at least there was a political agenda. It was the domino theory. Iraq is about nothing but George Bush's ego laced with imperialist ambitions. And it was helped by your government. Donald Sutherland
I call it like the domino theory of reality. If you can go one step at a time and it seems to make sense, you can then take your audience into an area that is relatively outlandish. Ivan Reitman
Adopting a domino theory he warned that, "If the Communists win in Rome, in Italy, it will cast a shadow on the entire world: France would become Communist, and then Spain and then all of Europe'. Source: Internet
It was to become the " domino theory ". Source: Internet