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tarmac (n.)

1903, Tarmac, a trademark name, short for tarmacadam (1882) "pavement created by spraying tar over crushed stone," from tar (n.1) + John L. McAdam (see macadam). By 1919, tarmac was being used generally in Great Britain for "runway."

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Definitions of tarmac
1
tarmac (n.)
a paving material of tar and broken stone; mixed in a factory and shaped during paving;
Synonyms: tarmacadam
tarmac (n.)
a paved surface having compressed layers of broken rocks held together with tar;
Synonyms: tarmacadam / macadam
2
tarmac (v.)
surface with macadam;
Synonyms: macadamize / macadamise
From wordnet.princeton.edu