mass noun(trademark in the UK)
1- material used for surfacing roads or other outdoor areas, consisting of broken stone mixed with tar〈英商标〉柏油碎石。
1.1
the tarmac
a runway or other area surfaced with such material柏油碎石铺的飞机跑道（或其他平面）。
(tarmacked, tarmacking)with obj.
- surface (a road or other outdoor area) with such material用柏油碎石铺（路或其他户外地区）：
as adj. tarmacked there are no tarmacked roads.没有柏油碎石马路。
词源
early 20th cent.: abbreviation of TARMACADAM.