Definition of running rail
: a rail that acts as a running surface for the flanged wheels of a car or locomotive — compare guardrail, third rail
- Trending Now: More Trending:
- asylum insubordinate promulgate epochal clemency
- ALL
What's Trending Now
More Trending Words
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
First Known Use of running rail
1847
Seen and Heard
What made you want to look up running rail? Please tell us where you read or heard it (including the quote, if possible).
