surface with macadam; "macadam the road"
Bitumen macadam coating aggregate for drive/path surfaces
Tarmac (short for tarmacadam, a portmanteau for tar-penetration macadam) is a type of highway surface. Strictly speaking, Tarmac refers to a material patented by E. Purnell Hooley in 1901.
Tarmac is a company operating in the United Kingdom, originally formed by Edgar Purnell Hooley as the Tar Macadam Syndicate in 1903. The company produces aggregates and road-surfacing materials, including Tarmac, from which the company's name is derived.