[{"Bold_text": "noun", "List Items": ["the letter Y,or something having a similar shape.", "Electricity.a three-phase,Y-shaped circuit arrangement.", "Railroads.a track arrangement with three switches and three legs for reversing the direction of a train."]}, {"Bold_text": "noun", "List Items": ["a river flowing from central Wales through SW England into the Severn estuary. 130 miles (210 km) long."]}]