- a macadamized road or pavement.
- the broken stone used in making such a road.
Origin of macadam
Examples from the Web for macadam
Cool, dry weather; relatively but not totally flat terrain; soft running surfaces, like dirt, gravel or macadam.Running the World
July 25, 2009
They are used as dust layers on earth, gravel and macadam surfaces.American Rural Highways
T. R. Agg
MacAdam asked that he should at least be bound over to keep the peace.Ireland as It Is
Robert John Buckley (AKA R.J.B.)
Utilitarianism was too much for it, and its stones fell to Macadam.Highways & Byways in Sussex
They gained the macadam of the lane that led out from the park gate into the country.Stubble
Some wonderful records were made in these contests on the macadam.Coaching Days & Ways
E. D. (Edward William Dirom) Cuming
- a road surface made of compressed layers of small broken stones, esp one that is bound together with tar or asphalt
Word Origin and History for macadam
1824, named for inventor, Scottish civil engineer John L. McAdam (1756-1836), who developed a method of levelling roads and paving them with gravel and outlined the process in his pamphlet "Remarks on the Present System of Road-Making" (1822). Originally, road material consisting of a solid mass of stones of nearly uniform size laid down in layers; he did not approve of the use of binding materials or rollers. The idea of mixing tar with the gravel began 1880s.