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roadbed - 3 dictionary results

road⋅bed

  [rohd-bed]
Use roadbed in a Sentence
–noun
1. Railroads.
a. the bed or foundation structure for the track of a railroad.
b. the layer of ballast immediately beneath the ties of a railroad track.
2. the material of which a road is composed.
Origin:
1830–40. Americanism; road + bed
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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road·bed   (rōd'běd')   
n.  
    1. The foundation upon which the ties, rails, and ballast of a railroad are laid.
    2. A layer of ballast directly under the ties.
  2. The foundation and surface of a road.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Roadbed

Road"bed`\, n. In railroads, the bed or foundation on which the superstructure (ties, rails, etc.) rests; in common roads, the whole material laid in place and ready for travel.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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