British spelling: currently treating or coating something with bitumen; the ongoing process of applying bitumen.
Present participle of 'bituminise,' formed by adding '-ing' to the verb stem. The '-ing' form describes ongoing or continuous actions.
While a road crew is bituminising a highway, the entire street is closed—the process requires heating bitumen to extremely high temperatures and carefully spreading it across the surface!
Complete word intelligence in one call. Free tier — 50 lookups/day.