third rail
The term "third rail" originates from rail transportation but has also gained a metaphorical meaning in politics.
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Definition
B2Rail Transportation
(technical)A rail that provides electric power to trains, usually placed beside or between the tracks.
Example
- The subway system uses a third rail to power the trains.
- Always stay clear of the third rail due to its high voltage.
C1Politics
(metaphorical)A highly controversial issue that is often avoided because it can provoke strong negative reactions.
Example
- Touching the topic of healthcare reform is like touching the third rail in politics.
- The politician avoided discussing immigration, considering it a third rail.
Similar
Terms that have similar or relatively close meanings to "third rail":