Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- a beam, post, rod, etc. placed crosswise to give support
- ☆ any of the transverse timbers supporting the rails of a railroad track
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A transverse beam or rod serving as a support, especially a beam that connects and supports the rails of a railroad.