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roadbed

[ rohd-bed ]

noun

  1. Railroads.
    1. the bed or foundation structure for the track of a railroad.
    2. the layer of ballast immediately beneath the ties of a railroad track.
  2. the material of which a road is composed.

roadbed

/ ˈəʊˌɛ /

noun

  1. the material used to make a road
  2. a layer of ballast that supports the sleepers of a railway track
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of roadbed1

1830–40. Americanism; road + bed

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road appleroadblock

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