I. ˈ ̷ ̷ˌ ̷ ̷ noun
Usage: often attributive
Etymology: black (I) + top
1. also blacktopping ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ : a blackish bituminous material used especially for surfacing roads, playgrounds, and airport runways and spread while in a plastic state over a base course of crushed rock, concrete, or an existing surface in need of resurfacing
2. : an area (as a road) surfaced with blacktop
II. transitive verb
: to surface (a road) with a blacktop coating