[{"Bold_text": null, "List Items": ["a brand of bituminous binder, similar to tarmacadam, for surfacing roads, airport runways, parking areas, etc."]}, {"Bold_text": "noun", "List Items": ["(lowercase)a road, airport runway, parking area, etc., paved with Tarmac, tarmacadam, or a layer of tar.", "(lowercase)a layer or covering of Tarmac, tarmacadam, or tar."]}]