- 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 asphalt.
Origin of macadamAfter John Loudon McAdam (1756-1836), Scottish civil engineer