Simple Definition of third rail
: a metal rail on a train track that carries electric current to the train's motor
: a difficult issue that politicians try to avoid talking about
Full Definition of third rail
1 : a metal rail through which electric current is led to the motors of an electric vehicle (as a subway car)
2 : a controversial issue usually avoided by politicians
Examples of third rail in a sentence
Social Security is the third rail of American politics.
First Known Use of third rail
Rhymes with third rail
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Learn More about third rail
Britannica.com: Encyclopedia article about third rail
Seen and Heard
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