This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Pavement made of layers of compacted broken stone, now usually bound with tar or asphalt.

n. The surface of a road consisting of layers of crushed stone (usually tar-coated for modern traffic).

n. Any road or street

n. The broken stone used in macadamized roadways.

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

adj. paved with macadam{2}.

n. Macadamized pavement.

n. The material used for a macadam pavement.

n. broken stone used in macadamized roadways

n. a paved surface having compressed layers of broken rocks held together with tar

"John McAdam designed the first modern highway of inexpensive paving material of soil and stone aggregate known as macadam during the Industrial Revolution."

macadamized   

paving    paving material    pavement    paved surface   

tar-macadam    asphalt    Wikipedia article on macadam   

dusting    highway    subgrade    crown    brick    dump truck    street    road    gravel    roller   

tartarmac    tartarmac    macadam    asphalt    Tarmac    tarmacadam   

Adam    Madam    Madame    madam    madame   

blacktop    asphalt    cobblestone    rutted    unpaved    downthe    two-lane    eternastone    stone-paved    miry