noun
- A rail through which electric current is supplied to an electric locomotive. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). third rail. Retrieved September 21, 2026, from http://smartdefine.org/third_rail/definitions/1208969 |
| Chicago | WordNet. 2010. "third rail" http://smartdefine.org/third_rail/definitions/1208969 (accessed September 21, 2026). |
| Harvard | WordNet 2010, third rail, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/third_rail/definitions/1208969>. |
| MLA | WordNet. "third rail" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/third_rail/definitions/1208969> |