Found 2 items, similar to roadbed.
English → English (WordNet) Definition: roadbed roadbed n : a bed supporting a road
English → English (gcide) Definition: Roadbed 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. [1913 Webster]