chiefly N. Amer. <主北美>
mass noun
1- asphalt, tarmacadam, or other black material used for surfacing roads（铺路用的）沥青, 柏油碎石：
as modifier blacktop roads.柏油路。
1.1
- count noun a road or area surfaced with such material柏油路; 柏油地面。
with obj.
- surface (a road or area) with such material给（道路或地面）铺沥青：
41 km had been blacktopped to date.
到那时为止已经铺了41公里柏油路。