roadbed

noun road·bed \ ˈrōd-ˌbed \
|Updated on: 29 May 2018

Definition of roadbed

1 a : the bed on which the ties, rails, and ballast of a railroad rest
b : the ballast or the upper surface of the ballast on which the ties rest
2 a : the earth foundation of a road prepared for surfacing
b : the part of the surface of a road traveled by vehicles

Recent Examples of roadbed from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'roadbed.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of roadbed

1828

in the meaning defined at sense 1a

See Words from the same year
NEW! Time Traveler

Learn More about roadbed


Seen and Heard

What made you want to look up roadbed? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

the quality or state of being insatiable

Get Word of the Day daily email!

Test Your Vocabulary

Name More Food!

Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!