From Longman Dictionary of Contemporary Englishmacadamma‧cad‧am /məˈkædəm/ noun [uncountable] TTRTIa road surface made of a mixture of broken stones and tar or asphalt SYN tarmac British English
Examples from the Corpus
macadam• Keep the roller wet so it doesn't pick up lumps of macadam.• I was blown to one side off the macadam, then dragged back and crashed down on the other.Origin macadam (1800-1900) John Loudon Macadam (1756-1836), Scottish engineer who invented it 