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Longman Dictionary of Contemporary English
macadam
noun
EXAMPLES FROM CORPUS
▪ I was blown to one side off the macadam, then dragged back and crashed down on the other.
▪ Keep the roller wet so it doesn't pick up lumps of macadam.
The Collaborative International Dictionary
macadam

macadam \macadam\ n. The broken stone used in macadamized roadways.

2. A paved surface formed of compressed layers of broken rocks held together with tar.

Syn: tartarmac, macadam.

macadam

macadam \macadam\ macadamized \macadamized\adj. 1. paved with macadam[2].

Syn: asphalt, tarmac, tarmacadam.

Douglas Harper's Etymology Dictionary
macadam

1824, named for inventor, Scottish civil engineer John L. McAdam (1756-1836), who developed a method of leveling roads and paving them with gravel and outlined the process in his pamphlet "Remarks on the Present System of Road-Making" (1822). Originally the word meant road material consisting of a solid mass of stones of nearly uniform size laid down in layers (McAdam did not approve of the use of binding materials or rollers). The idea of mixing tar with the gravel began 1880s.

Wiktionary
macadam

n. 1 (context uncountable English) The surface of a road consisting of layers of crushed stone (usually tar-coated for modern traffic). 2 (context US dated countable English) Any road or street vb. (context transitive English) To cover or surface with macadam.

WordNet
macadam
  1. n. broken stone used in macadamized roadways

  2. a paved surface having compressed layers of broken rocks held together with tar [syn: tarmacadam, tarmac]

Wikipedia
Macadam

Macadam is a type of road construction pioneered by Scottish engineer John Loudon McAdam around 1820. The method simplified what had been considered state of the art at that point. Single-sized crushed stone layers of small angular stones are placed in shallow lifts and compacted thoroughly. A binding layer of stone dust, crushed stone from the original material may form; it may also, after rolling, be covered with a binder of fines and small crushed rock.

Macadam (illustrator)

Macadam was a British illustrator active in the 1920s and 1930s. Amongst his commercial works are several dust wrapper designs for London-based publishers, most important amongst which is the design for the dust wrapper for the first edition of Agatha Christie's first straight novel Giant's Bread. Following the discovery of an archive of Macadam's work in 2016, it was possible to connect his work on Giant's Bread to other known designs.

Usage examples of "macadam".

After Mrs Malcolm, by the settlement of Captain Macadam, had given up her dealing, two maiden women, that were sisters, Betty and Janet Pawkie, came in among us from Ayr, where they had friends in league with some of the laigh land folk, that carried on the contraband with the Isle of Man, which was the very eye of the smuggling.

The fat urethane wheels ran amazingly well over macadam, and on the first downslope, Ern found Lance spurting ahead with a few kicks.

She had dreamed about him the night before, rolling, clanking away from her down a straight old macadam road, out in the country, fields and hills in metallic cloudlight toward the end of the day, aware of exactly how many hours and minutes to dark, how many foot-candles left in the sky, bringing behind him like ducklings a line of lamps, generators, and beam projectors each on its little trailer rig, heading for his next job, the next carnival or auto lot, still wanting nothing but the deadly amps transmogrified to light, the great white-hot death-cold spill and flood and thrust, wherever he had to go, on whatever terms he had to take, to get to keep doing it.

Standing beside their cars, the spectators watched this puddle forming on the oil-stained macadam.

He wondered if the Ulva bombers had reached their mark, and whether Macadam had managed to scrounge up enough Plasroc and make the interminable trip north, at least as far as Cape Dorset, where his ground support was waiting.

Alastair, determined that he should not look at the watch, coaxed him to sing again, and praised his music, and, when he did not respond, himself sang--for this new mood had brought back his voice--a gypsy lay of his own land, a catch of the wandering Macadams that trail up and down the sea-coast.

If Gyla had been anormal girl, she never would have had to endure something like Macadam.

It was a hundred-credit note: MacAdam had said he could only print one denomination and it had to be a hundred credits.

No, it defied all explanation, so I sat fretting in the cab- with the big man at my side and his two mates opposite, for what must have been a good half-hour, and then the cab stopped and we descended on what looked like a suburban street, with big detached houses in gloomy gardens either side, and underfoot nothing but Washington macadam: two feet of gumbo.

Looping black marks scored the expansion joint macadam in parabolas.

These houses were lined up along the cliff, facing seaward, presenting their back doors to the deadend macadam road.

Black Macadam road came up with frightening speed and got blacker and blacker.

The heat shimmered from the sand, the black macadam road absorbing most of the heat and hurting the feet of the men.

West of Venafro the mountain steepness blocked road building, except for one narrow macadam road running southwest through the village of Ceppagna and the town of San Pietro Infme, where it joined the main highway leading north to Cassino.

Even before he reaches the tree line, he can see the remains of an old macadam road, broken and overgrown, cutting downhill between the trees.