[{"Bold_text": "noun", "List Items": ["Nautical.the clear space between two decks.", "Also called headway .clear vertical space, as between the head and sill of a doorway, the ceiling and floor of a room, or the ceiling of a vehicular passageway and a vehicle roof, as to allow passage or comfortable occupancy:over 7.5 feet of headroom in the attic;a covered bridge with limited headroom.clear vertical space above one’s head, as in a vehicle or room:plenty of headroom for passengers.", "clear vertical space, as between the head and sill of a doorway, the ceiling and floor of a room, or the ceiling of a vehicular passageway and a vehicle roof, as to allow passage or comfortable occupancy:over 7.5 feet of headroom in the attic;a covered bridge with limited headroom.", "clear vertical space above one’s head, as in a vehicle or room:plenty of headroom for passengers.", "Audio. dynamic headroom dynamic headroom."]}]