1. (noun)tarmacadam, tarmac a paving material of tar and broken stone; mixed in a factory and shaped during paving Synonyms: tarmac, tarmacadam, macadam
2. (noun)tarmacadam, tarmac, macadam a paved surface having compressed layers of broken rocks held together with tar Synonyms: tarmac, tarmacadam, macadam