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macadam

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noun mac·ad·am \mə-ˈka-dəm\

Simple Definition of macadam

  • : a road surface made with a dark material that contains small broken stones

Source: Merriam-Webster's Learner's Dictionary

Full Definition of macadam

  1. :  macadamized roadway or pavement especially with a bituminous binder

Did You Know?

In 1783, inventor John Loudon McAdam returned to his native Scotland after amassing a fortune in New York City. He became the road trustee for his district and quickly set his inventiveness to remedying the terrible condition of local roads. After numerous experiments, he created a new road surfacing material made of bits of stone that became compressed into a solid mass as traffic passed over them. His invention revolutionized road construction and transportation, and engineers and the public alike honored him by using his name (respelled macadam) as a generic term for the material or pavement made from it. He is further immortalized in the verb macadamize, which names the process of installing macadam on a road.

Origin of macadam

John L. McAdam †1836 British engineer


First Known Use: 1824


MACADAM Defined for Kids

macadam

play
noun mac·ad·am \mə-ˈka-dəm\

Definition of macadam for Students

  1. :  a road surface made of small closely packed broken stone




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