- small broken stones used in making roads; esp., such stones combined with a binder such as tar or asphalt
- macadamized pavement
Origin of macadamafter John L. McAdam (1756-1836), Scottish engineer
Pavement made of layers of compacted broken stone, now usually bound with tar or asphalt.
Origin of macadamAfter John Loudon McAdam, (1756–1836), Scottish civil engineer.