ˈ ̷ ̷ˌ ̷ ̷ noun
1.
a. : the bed or foundation of a railroad on which the ties, rails, and ballast rest
b. : the ballast or the upper surface of the ballast on which the ties rest
2.
a. : the earth foundation of a highway or street, graded and prepared for paving or surfacing
b. : the part of the surface of a highway or street traveled by vehicles